/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 15:13:20,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 15:13:20,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 15:13:21,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 15:13:21,059 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 15:13:21,075 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 15:13:21,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 15:13:21,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 15:13:21,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 15:13:21,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 15:13:21,076 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 15:13:21,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 15:13:21,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 15:13:21,077 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 15:13:21,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 15:13:21,077 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 15:13:21,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 15:13:21,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 15:13:21,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 15:13:21,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 15:13:21,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 15:13:21,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 15:13:21,078 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 15:13:21,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 15:13:21,078 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 15:13:21,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 15:13:21,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 15:13:21,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 15:13:21,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 15:13:21,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 15:13:21,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:13:21,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 15:13:21,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 15:13:21,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 15:13:21,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 15:13:21,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 15:13:21,079 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 15:13:21,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 15:13:21,080 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 15:13:21,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 15:13:21,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 15:13:21,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 15:13:21,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 15:13:21,253 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 15:13:21,254 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 15:13:21,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl [2022-01-18 15:13:21,255 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl' [2022-01-18 15:13:21,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 15:13:21,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 15:13:21,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 15:13:21,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 15:13:21,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 15:13:21,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:13:21" (1/1) ... [2022-01-18 15:13:21,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:13:21" (1/1) ... [2022-01-18 15:13:21,291 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 15:13:21,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 15:13:21,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 15:13:21,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 15:13:21,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 15:13:21,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:13:21" (1/1) ... [2022-01-18 15:13:21,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:13:21" (1/1) ... [2022-01-18 15:13:21,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:13:21" (1/1) ... [2022-01-18 15:13:21,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:13:21" (1/1) ... [2022-01-18 15:13:21,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:13:21" (1/1) ... [2022-01-18 15:13:21,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:13:21" (1/1) ... [2022-01-18 15:13:21,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:13:21" (1/1) ... [2022-01-18 15:13:21,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 15:13:21,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 15:13:21,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 15:13:21,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 15:13:21,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:13:21" (1/1) ... [2022-01-18 15:13:21,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:13:21,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:21,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 15:13:21,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 15:13:21,354 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 15:13:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 15:13:21,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 15:13:21,354 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 15:13:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 15:13:21,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 15:13:21,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 15:13:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 15:13:21,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 15:13:21,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 15:13:21,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 15:13:21,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 15:13:21,356 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 15:13:21,392 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 15:13:21,393 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 15:13:21,482 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 15:13:21,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 15:13:21,529 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-18 15:13:21,531 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:13:21 BoogieIcfgContainer [2022-01-18 15:13:21,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 15:13:21,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 15:13:21,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 15:13:21,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 15:13:21,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:13:21" (1/2) ... [2022-01-18 15:13:21,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15529893 and model type name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 03:13:21, skipping insertion in model container [2022-01-18 15:13:21,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:13:21" (2/2) ... [2022-01-18 15:13:21,536 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-trans.wvr.bpl [2022-01-18 15:13:21,539 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 15:13:21,539 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 15:13:21,539 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 15:13:21,539 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 15:13:21,609 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 15:13:21,644 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 15:13:21,648 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 15:13:21,649 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 15:13:21,656 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2022-01-18 15:13:21,678 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:21,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:13:21,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:21,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:21,686 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:21,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:21,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1091082122, now seen corresponding path program 1 times [2022-01-18 15:13:21,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:21,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756225141] [2022-01-18 15:13:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:21,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:21,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:21,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756225141] [2022-01-18 15:13:21,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756225141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:13:21,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:13:21,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:13:21,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037323021] [2022-01-18 15:13:21,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:13:21,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:13:21,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:21,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:13:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:13:21,881 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:21,991 INFO L93 Difference]: Finished difference Result 192 states and 551 transitions. [2022-01-18 15:13:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:13:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:13:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:22,003 INFO L225 Difference]: With dead ends: 192 [2022-01-18 15:13:22,003 INFO L226 Difference]: Without dead ends: 129 [2022-01-18 15:13:22,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:13:22,013 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:22,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:13:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-18 15:13:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-01-18 15:13:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-01-18 15:13:22,086 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2022-01-18 15:13:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:22,086 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-01-18 15:13:22,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-01-18 15:13:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:13:22,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:22,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:22,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 15:13:22,088 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:22,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2097087164, now seen corresponding path program 1 times [2022-01-18 15:13:22,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:22,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855468412] [2022-01-18 15:13:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:22,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:13:22,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:22,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855468412] [2022-01-18 15:13:22,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855468412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:13:22,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:13:22,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:13:22,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67758057] [2022-01-18 15:13:22,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:13:22,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:13:22,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:22,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:13:22,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:13:22,147 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:22,226 INFO L93 Difference]: Finished difference Result 221 states and 640 transitions. [2022-01-18 15:13:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:13:22,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:13:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:22,229 INFO L225 Difference]: With dead ends: 221 [2022-01-18 15:13:22,230 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 15:13:22,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:13:22,231 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:22,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 19 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:13:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 15:13:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-01-18 15:13:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.910828025477707) internal successors, (457), 157 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2022-01-18 15:13:22,242 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 18 [2022-01-18 15:13:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:22,242 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2022-01-18 15:13:22,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2022-01-18 15:13:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:13:22,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:22,244 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:22,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 15:13:22,244 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:22,245 INFO L85 PathProgramCache]: Analyzing trace with hash -30499761, now seen corresponding path program 1 times [2022-01-18 15:13:22,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:22,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507996330] [2022-01-18 15:13:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:22,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:22,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:22,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507996330] [2022-01-18 15:13:22,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507996330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:22,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409736608] [2022-01-18 15:13:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:22,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:22,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:22,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:22,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 15:13:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:22,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 15:13:22,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:22,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 89 [2022-01-18 15:13:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:23,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:23,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:23,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 105 [2022-01-18 15:13:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:23,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409736608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:23,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:23,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-01-18 15:13:23,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429457410] [2022-01-18 15:13:23,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:23,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:13:23,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:23,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:13:23,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:23,810 INFO L87 Difference]: Start difference. First operand 158 states and 457 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:25,604 INFO L93 Difference]: Finished difference Result 468 states and 1378 transitions. [2022-01-18 15:13:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:13:25,614 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:13:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:25,616 INFO L225 Difference]: With dead ends: 468 [2022-01-18 15:13:25,616 INFO L226 Difference]: Without dead ends: 380 [2022-01-18 15:13:25,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:13:25,617 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 262 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:25,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 296 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:13:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-18 15:13:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 204. [2022-01-18 15:13:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9655172413793105) internal successors, (602), 203 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 602 transitions. [2022-01-18 15:13:25,644 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 602 transitions. Word has length 19 [2022-01-18 15:13:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:25,645 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 602 transitions. [2022-01-18 15:13:25,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 602 transitions. [2022-01-18 15:13:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:13:25,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:25,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:25,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:25,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:25,852 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:25,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:25,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1742095211, now seen corresponding path program 2 times [2022-01-18 15:13:25,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:25,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467640902] [2022-01-18 15:13:25,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:25,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:25,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:25,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467640902] [2022-01-18 15:13:25,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467640902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:25,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527434480] [2022-01-18 15:13:25,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:13:25,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:25,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:25,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:25,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 15:13:25,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:25,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:25,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 15:13:26,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:26,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 115 [2022-01-18 15:13:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:26,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:26,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:26,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 88 [2022-01-18 15:13:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:26,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527434480] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:26,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:26,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 15:13:26,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401045493] [2022-01-18 15:13:26,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:26,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:13:26,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:26,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:13:26,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:13:26,792 INFO L87 Difference]: Start difference. First operand 204 states and 602 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:27,424 INFO L93 Difference]: Finished difference Result 382 states and 1095 transitions. [2022-01-18 15:13:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:13:27,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:13:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:27,426 INFO L225 Difference]: With dead ends: 382 [2022-01-18 15:13:27,426 INFO L226 Difference]: Without dead ends: 349 [2022-01-18 15:13:27,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:13:27,427 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:27,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 272 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-18 15:13:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 214. [2022-01-18 15:13:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9906103286384975) internal successors, (637), 213 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 637 transitions. [2022-01-18 15:13:27,435 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 637 transitions. Word has length 19 [2022-01-18 15:13:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:27,435 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 637 transitions. [2022-01-18 15:13:27,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 637 transitions. [2022-01-18 15:13:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:13:27,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:27,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:27,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:27,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-18 15:13:27,651 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:27,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1059891211, now seen corresponding path program 3 times [2022-01-18 15:13:27,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:27,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924042791] [2022-01-18 15:13:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:27,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:27,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924042791] [2022-01-18 15:13:27,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924042791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933954703] [2022-01-18 15:13:27,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:13:27,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:27,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:27,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:27,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 15:13:27,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:13:27,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:27,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:13:27,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:28,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 129 [2022-01-18 15:13:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:28,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:28,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:28,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 105 [2022-01-18 15:13:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:28,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933954703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:28,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:28,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 15:13:28,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074975696] [2022-01-18 15:13:28,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:28,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:13:28,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:28,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:13:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:13:28,947 INFO L87 Difference]: Start difference. First operand 214 states and 637 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:30,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:30,241 INFO L93 Difference]: Finished difference Result 635 states and 1779 transitions. [2022-01-18 15:13:30,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:13:30,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:13:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:30,243 INFO L225 Difference]: With dead ends: 635 [2022-01-18 15:13:30,243 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 15:13:30,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:13:30,244 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 205 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:30,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 317 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 15:13:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 229. [2022-01-18 15:13:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 3.1008771929824563) internal successors, (707), 228 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 707 transitions. [2022-01-18 15:13:30,253 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 707 transitions. Word has length 19 [2022-01-18 15:13:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:30,253 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 707 transitions. [2022-01-18 15:13:30,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 707 transitions. [2022-01-18 15:13:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:13:30,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:30,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:30,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:30,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:30,471 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:30,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:30,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1696358065, now seen corresponding path program 4 times [2022-01-18 15:13:30,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:30,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835457821] [2022-01-18 15:13:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:30,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:30,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835457821] [2022-01-18 15:13:30,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835457821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136856927] [2022-01-18 15:13:30,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:13:30,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:30,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:30,586 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:30,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 15:13:30,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:13:30,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:30,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 15:13:30,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:30,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 108 [2022-01-18 15:13:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:31,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:31,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:31,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 142 [2022-01-18 15:13:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:31,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136856927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:31,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:31,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-01-18 15:13:31,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672292138] [2022-01-18 15:13:31,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:31,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:13:31,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:31,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:13:31,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:31,792 INFO L87 Difference]: Start difference. First operand 229 states and 707 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:32,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:32,701 INFO L93 Difference]: Finished difference Result 441 states and 1281 transitions. [2022-01-18 15:13:32,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:13:32,702 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:13:32,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:32,703 INFO L225 Difference]: With dead ends: 441 [2022-01-18 15:13:32,703 INFO L226 Difference]: Without dead ends: 386 [2022-01-18 15:13:32,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:13:32,704 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 185 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:32,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 237 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-18 15:13:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 234. [2022-01-18 15:13:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.1201716738197427) internal successors, (727), 233 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 727 transitions. [2022-01-18 15:13:32,710 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 727 transitions. Word has length 19 [2022-01-18 15:13:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:32,710 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 727 transitions. [2022-01-18 15:13:32,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 727 transitions. [2022-01-18 15:13:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:13:32,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:32,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:32,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:32,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:32,912 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:32,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:32,912 INFO L85 PathProgramCache]: Analyzing trace with hash -708866453, now seen corresponding path program 5 times [2022-01-18 15:13:32,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:32,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584634736] [2022-01-18 15:13:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:32,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:33,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:33,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584634736] [2022-01-18 15:13:33,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584634736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:33,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739779557] [2022-01-18 15:13:33,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:13:33,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:33,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:33,010 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:33,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 15:13:33,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:33,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:33,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 15:13:33,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:33,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2022-01-18 15:13:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:33,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:33,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:33,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 15:13:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:34,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739779557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:34,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:34,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-01-18 15:13:34,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197629803] [2022-01-18 15:13:34,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:34,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:13:34,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:34,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:13:34,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:34,096 INFO L87 Difference]: Start difference. First operand 234 states and 727 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:35,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:35,076 INFO L93 Difference]: Finished difference Result 460 states and 1302 transitions. [2022-01-18 15:13:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:13:35,077 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:13:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:35,078 INFO L225 Difference]: With dead ends: 460 [2022-01-18 15:13:35,078 INFO L226 Difference]: Without dead ends: 405 [2022-01-18 15:13:35,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:13:35,079 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 229 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:35,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 248 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:35,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-18 15:13:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 244. [2022-01-18 15:13:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.094650205761317) internal successors, (752), 243 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 752 transitions. [2022-01-18 15:13:35,086 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 752 transitions. Word has length 19 [2022-01-18 15:13:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:35,086 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 752 transitions. [2022-01-18 15:13:35,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 752 transitions. [2022-01-18 15:13:35,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:13:35,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:35,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:35,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-18 15:13:35,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:35,303 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:35,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:35,303 INFO L85 PathProgramCache]: Analyzing trace with hash -414706651, now seen corresponding path program 6 times [2022-01-18 15:13:35,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:35,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608411557] [2022-01-18 15:13:35,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:35,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:35,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:35,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608411557] [2022-01-18 15:13:35,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608411557] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:35,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872025881] [2022-01-18 15:13:35,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:13:35,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:35,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:35,382 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:35,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 15:13:35,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:13:35,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:35,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:13:35,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:35,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 119 [2022-01-18 15:13:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:35,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:36,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:36,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 105 [2022-01-18 15:13:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:36,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872025881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:36,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:36,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:13:36,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632762334] [2022-01-18 15:13:36,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:36,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:13:36,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:36,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:13:36,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:13:36,259 INFO L87 Difference]: Start difference. First operand 244 states and 752 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:36,782 INFO L93 Difference]: Finished difference Result 453 states and 1342 transitions. [2022-01-18 15:13:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:13:36,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:13:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:36,784 INFO L225 Difference]: With dead ends: 453 [2022-01-18 15:13:36,784 INFO L226 Difference]: Without dead ends: 387 [2022-01-18 15:13:36,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:13:36,785 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 118 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:36,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 171 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-18 15:13:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 254. [2022-01-18 15:13:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.130434782608696) internal successors, (792), 253 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 792 transitions. [2022-01-18 15:13:36,791 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 792 transitions. Word has length 19 [2022-01-18 15:13:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:36,791 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 792 transitions. [2022-01-18 15:13:36,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 792 transitions. [2022-01-18 15:13:36,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:13:36,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:36,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:36,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:36,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:36,993 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:36,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1078274223, now seen corresponding path program 7 times [2022-01-18 15:13:36,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:36,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694151065] [2022-01-18 15:13:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:36,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:37,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:37,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694151065] [2022-01-18 15:13:37,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694151065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:37,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131641099] [2022-01-18 15:13:37,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:13:37,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:37,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:37,106 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:37,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 15:13:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:37,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 15:13:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:37,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2022-01-18 15:13:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:37,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:38,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:38,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 130 [2022-01-18 15:13:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:38,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131641099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:38,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:38,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 15:13:38,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746223691] [2022-01-18 15:13:38,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:38,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:13:38,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:38,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:13:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:13:38,242 INFO L87 Difference]: Start difference. First operand 254 states and 792 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:39,408 INFO L93 Difference]: Finished difference Result 474 states and 1359 transitions. [2022-01-18 15:13:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:13:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:13:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:39,410 INFO L225 Difference]: With dead ends: 474 [2022-01-18 15:13:39,410 INFO L226 Difference]: Without dead ends: 364 [2022-01-18 15:13:39,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:13:39,411 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 203 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:39,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 255 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:39,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-18 15:13:39,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 254. [2022-01-18 15:13:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.130434782608696) internal successors, (792), 253 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 792 transitions. [2022-01-18 15:13:39,417 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 792 transitions. Word has length 19 [2022-01-18 15:13:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:39,417 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 792 transitions. [2022-01-18 15:13:39,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 792 transitions. [2022-01-18 15:13:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:13:39,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:39,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:39,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 15:13:39,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:39,631 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:39,632 INFO L85 PathProgramCache]: Analyzing trace with hash 441807369, now seen corresponding path program 8 times [2022-01-18 15:13:39,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:39,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834629550] [2022-01-18 15:13:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:39,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:39,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:39,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834629550] [2022-01-18 15:13:39,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834629550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:39,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493283061] [2022-01-18 15:13:39,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:13:39,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:39,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:39,803 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:39,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 15:13:39,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:39,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:39,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:13:39,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:40,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:40,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 142 [2022-01-18 15:13:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:40,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:41,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:41,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 117 [2022-01-18 15:13:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:41,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493283061] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:41,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:41,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:13:41,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290224281] [2022-01-18 15:13:41,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:41,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:13:41,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:41,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:13:41,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:13:41,208 INFO L87 Difference]: Start difference. First operand 254 states and 792 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:44,105 INFO L93 Difference]: Finished difference Result 832 states and 2354 transitions. [2022-01-18 15:13:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:13:44,105 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:13:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:44,108 INFO L225 Difference]: With dead ends: 832 [2022-01-18 15:13:44,108 INFO L226 Difference]: Without dead ends: 670 [2022-01-18 15:13:44,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=490, Invalid=1766, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:13:44,109 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 358 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:44,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 313 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 958 Invalid, 0 Unknown, 149 Unchecked, 0.5s Time] [2022-01-18 15:13:44,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-18 15:13:44,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 293. [2022-01-18 15:13:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.1198630136986303) internal successors, (911), 292 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:44,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 911 transitions. [2022-01-18 15:13:44,116 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 911 transitions. Word has length 19 [2022-01-18 15:13:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:44,116 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 911 transitions. [2022-01-18 15:13:44,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 911 transitions. [2022-01-18 15:13:44,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:13:44,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:44,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:44,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-18 15:13:44,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 15:13:44,331 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1429298981, now seen corresponding path program 9 times [2022-01-18 15:13:44,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:44,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541155795] [2022-01-18 15:13:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:44,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:44,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:44,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541155795] [2022-01-18 15:13:44,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541155795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:44,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133241867] [2022-01-18 15:13:44,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:13:44,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:44,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:44,419 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:44,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 15:13:44,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:13:44,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:44,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:13:44,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:44,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 105 [2022-01-18 15:13:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:44,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:45,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:45,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 112 [2022-01-18 15:13:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:45,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133241867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:45,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:45,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 15:13:45,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279354817] [2022-01-18 15:13:45,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:45,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:13:45,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:45,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:13:45,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:13:45,440 INFO L87 Difference]: Start difference. First operand 293 states and 911 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:46,949 INFO L93 Difference]: Finished difference Result 642 states and 1838 transitions. [2022-01-18 15:13:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:13:46,949 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:13:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:46,951 INFO L225 Difference]: With dead ends: 642 [2022-01-18 15:13:46,951 INFO L226 Difference]: Without dead ends: 557 [2022-01-18 15:13:46,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:13:46,952 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 256 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:46,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 277 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-18 15:13:46,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 312. [2022-01-18 15:13:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.102893890675241) internal successors, (965), 311 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:46,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 965 transitions. [2022-01-18 15:13:46,959 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 965 transitions. Word has length 19 [2022-01-18 15:13:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:46,959 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 965 transitions. [2022-01-18 15:13:46,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 965 transitions. [2022-01-18 15:13:46,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:13:46,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:46,960 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:46,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-18 15:13:47,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:47,178 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:47,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1917424947, now seen corresponding path program 10 times [2022-01-18 15:13:47,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:47,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172854018] [2022-01-18 15:13:47,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:47,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:47,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:47,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172854018] [2022-01-18 15:13:47,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172854018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:47,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009823807] [2022-01-18 15:13:47,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:13:47,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:47,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:47,299 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:47,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 15:13:47,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:13:47,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:47,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 15:13:47,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:47,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 99 [2022-01-18 15:13:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:47,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:48,369 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:48,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 95 [2022-01-18 15:13:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:48,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009823807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:48,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:48,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 15:13:48,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361072244] [2022-01-18 15:13:48,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:48,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:13:48,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:48,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:13:48,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:13:48,446 INFO L87 Difference]: Start difference. First operand 312 states and 965 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:50,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:50,354 INFO L93 Difference]: Finished difference Result 735 states and 2097 transitions. [2022-01-18 15:13:50,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:13:50,354 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:13:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:50,356 INFO L225 Difference]: With dead ends: 735 [2022-01-18 15:13:50,356 INFO L226 Difference]: Without dead ends: 665 [2022-01-18 15:13:50,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:13:50,357 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 294 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:50,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 268 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-18 15:13:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 326. [2022-01-18 15:13:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.1538461538461537) internal successors, (1025), 325 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1025 transitions. [2022-01-18 15:13:50,364 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1025 transitions. Word has length 19 [2022-01-18 15:13:50,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:50,365 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1025 transitions. [2022-01-18 15:13:50,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1025 transitions. [2022-01-18 15:13:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:13:50,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:50,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:50,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:50,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 15:13:50,581 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:50,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1390050737, now seen corresponding path program 11 times [2022-01-18 15:13:50,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:50,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702749803] [2022-01-18 15:13:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:50,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:50,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:50,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702749803] [2022-01-18 15:13:50,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702749803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:50,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169443178] [2022-01-18 15:13:50,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:13:50,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:50,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:50,717 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:50,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 15:13:50,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:50,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:50,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 15:13:50,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:51,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2022-01-18 15:13:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:51,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:51,471 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:51,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 125 [2022-01-18 15:13:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:51,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169443178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:51,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:51,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:13:51,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048764109] [2022-01-18 15:13:51,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:51,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:13:51,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:51,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:13:51,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:13:51,549 INFO L87 Difference]: Start difference. First operand 326 states and 1025 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:52,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:52,461 INFO L93 Difference]: Finished difference Result 715 states and 2035 transitions. [2022-01-18 15:13:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:13:52,461 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:13:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:52,464 INFO L225 Difference]: With dead ends: 715 [2022-01-18 15:13:52,464 INFO L226 Difference]: Without dead ends: 609 [2022-01-18 15:13:52,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:13:52,464 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 196 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:52,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 228 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-01-18 15:13:52,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 342. [2022-01-18 15:13:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.1378299120234603) internal successors, (1070), 341 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1070 transitions. [2022-01-18 15:13:52,471 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1070 transitions. Word has length 19 [2022-01-18 15:13:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:52,471 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1070 transitions. [2022-01-18 15:13:52,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:52,471 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1070 transitions. [2022-01-18 15:13:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:13:52,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:52,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:52,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:52,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 15:13:52,693 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:52,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1631982851, now seen corresponding path program 12 times [2022-01-18 15:13:52,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:52,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67813064] [2022-01-18 15:13:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:52,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:52,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:52,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67813064] [2022-01-18 15:13:52,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67813064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:52,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746376546] [2022-01-18 15:13:52,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:13:52,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:52,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:52,820 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:52,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 15:13:52,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:13:52,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:52,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:13:52,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:53,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 122 [2022-01-18 15:13:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:53,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:53,718 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:53,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 107 [2022-01-18 15:13:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:53,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746376546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:53,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:53,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:13:53,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41759613] [2022-01-18 15:13:53,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:53,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:13:53,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:13:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:13:53,796 INFO L87 Difference]: Start difference. First operand 342 states and 1070 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:57,253 INFO L93 Difference]: Finished difference Result 1048 states and 2909 transitions. [2022-01-18 15:13:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:13:57,254 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:13:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:57,257 INFO L225 Difference]: With dead ends: 1048 [2022-01-18 15:13:57,257 INFO L226 Difference]: Without dead ends: 911 [2022-01-18 15:13:57,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=861, Invalid=2921, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 15:13:57,259 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 420 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:57,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 380 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:13:57,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-01-18 15:13:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 358. [2022-01-18 15:13:57,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.1176470588235294) internal successors, (1113), 357 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1113 transitions. [2022-01-18 15:13:57,269 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1113 transitions. Word has length 19 [2022-01-18 15:13:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:57,269 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1113 transitions. [2022-01-18 15:13:57,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1113 transitions. [2022-01-18 15:13:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:57,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:57,270 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:57,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:57,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 15:13:57,483 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:57,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1561184996, now seen corresponding path program 13 times [2022-01-18 15:13:57,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:57,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658708504] [2022-01-18 15:13:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:57,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:57,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:57,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658708504] [2022-01-18 15:13:57,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658708504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:57,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764865512] [2022-01-18 15:13:57,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:13:57,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:57,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:57,587 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:57,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 15:13:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:57,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:13:57,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:57,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:13:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:57,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:57,861 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:57,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:13:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:57,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764865512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:57,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:57,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:13:57,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557686141] [2022-01-18 15:13:57,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:57,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:13:57,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:57,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:13:57,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:13:57,880 INFO L87 Difference]: Start difference. First operand 358 states and 1113 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:58,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:58,254 INFO L93 Difference]: Finished difference Result 580 states and 1706 transitions. [2022-01-18 15:13:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:13:58,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:58,256 INFO L225 Difference]: With dead ends: 580 [2022-01-18 15:13:58,256 INFO L226 Difference]: Without dead ends: 580 [2022-01-18 15:13:58,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:13:58,257 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:58,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 188 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:58,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-18 15:13:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 376. [2022-01-18 15:13:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.1146666666666665) internal successors, (1168), 375 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1168 transitions. [2022-01-18 15:13:58,263 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1168 transitions. Word has length 20 [2022-01-18 15:13:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:58,263 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1168 transitions. [2022-01-18 15:13:58,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1168 transitions. [2022-01-18 15:13:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:58,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:58,264 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:58,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:58,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 15:13:58,480 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:58,480 INFO L85 PathProgramCache]: Analyzing trace with hash 463696994, now seen corresponding path program 14 times [2022-01-18 15:13:58,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:58,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908108289] [2022-01-18 15:13:58,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:58,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:58,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:58,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908108289] [2022-01-18 15:13:58,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908108289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:58,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98155068] [2022-01-18 15:13:58,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:13:58,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:58,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:58,566 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:58,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 15:13:58,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:58,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:58,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:13:58,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:58,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:13:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:58,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:58,880 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:58,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:13:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:58,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98155068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:58,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:58,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:13:58,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955290799] [2022-01-18 15:13:58,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:58,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:13:58,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:58,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:13:58,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:13:58,905 INFO L87 Difference]: Start difference. First operand 376 states and 1168 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:59,259 INFO L93 Difference]: Finished difference Result 632 states and 1827 transitions. [2022-01-18 15:13:59,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:13:59,259 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:59,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:59,261 INFO L225 Difference]: With dead ends: 632 [2022-01-18 15:13:59,261 INFO L226 Difference]: Without dead ends: 632 [2022-01-18 15:13:59,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:13:59,262 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 203 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:59,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 158 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-01-18 15:13:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 379. [2022-01-18 15:13:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.119047619047619) internal successors, (1179), 378 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1179 transitions. [2022-01-18 15:13:59,269 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1179 transitions. Word has length 20 [2022-01-18 15:13:59,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:59,269 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1179 transitions. [2022-01-18 15:13:59,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:59,269 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1179 transitions. [2022-01-18 15:13:59,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:59,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:59,270 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:59,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:59,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:59,483 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:59,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1345774428, now seen corresponding path program 15 times [2022-01-18 15:13:59,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:59,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695251913] [2022-01-18 15:13:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:59,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:59,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:59,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695251913] [2022-01-18 15:13:59,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695251913] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:59,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385288027] [2022-01-18 15:13:59,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:13:59,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:59,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:59,575 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:59,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 15:13:59,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:13:59,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:59,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:13:59,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:59,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:13:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:59,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:59,869 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:59,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:13:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:59,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385288027] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:59,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:59,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:13:59,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201340375] [2022-01-18 15:13:59,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:59,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:13:59,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:59,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:13:59,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:13:59,889 INFO L87 Difference]: Start difference. First operand 379 states and 1179 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:00,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:00,253 INFO L93 Difference]: Finished difference Result 589 states and 1724 transitions. [2022-01-18 15:14:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:00,255 INFO L225 Difference]: With dead ends: 589 [2022-01-18 15:14:00,255 INFO L226 Difference]: Without dead ends: 583 [2022-01-18 15:14:00,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:14:00,256 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 144 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:00,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 187 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-18 15:14:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 379. [2022-01-18 15:14:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.111111111111111) internal successors, (1176), 378 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1176 transitions. [2022-01-18 15:14:00,262 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1176 transitions. Word has length 20 [2022-01-18 15:14:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:00,262 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1176 transitions. [2022-01-18 15:14:00,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1176 transitions. [2022-01-18 15:14:00,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:00,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:00,264 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:00,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:00,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 15:14:00,467 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:00,468 INFO L85 PathProgramCache]: Analyzing trace with hash -42649272, now seen corresponding path program 16 times [2022-01-18 15:14:00,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:00,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120106934] [2022-01-18 15:14:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:00,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:00,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:00,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120106934] [2022-01-18 15:14:00,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120106934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:00,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772400369] [2022-01-18 15:14:00,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:00,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:00,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:00,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:00,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 15:14:00,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:00,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:00,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:00,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:00,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:14:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:00,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:00,931 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:00,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:00,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772400369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:00,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:00,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:00,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157120265] [2022-01-18 15:14:00,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:00,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:00,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:00,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:00,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:00,958 INFO L87 Difference]: Start difference. First operand 379 states and 1176 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:01,389 INFO L93 Difference]: Finished difference Result 574 states and 1690 transitions. [2022-01-18 15:14:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:01,389 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:01,391 INFO L225 Difference]: With dead ends: 574 [2022-01-18 15:14:01,391 INFO L226 Difference]: Without dead ends: 574 [2022-01-18 15:14:01,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:14:01,392 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 127 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:01,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 214 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-18 15:14:01,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 385. [2022-01-18 15:14:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.1197916666666665) internal successors, (1198), 384 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1198 transitions. [2022-01-18 15:14:01,398 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1198 transitions. Word has length 20 [2022-01-18 15:14:01,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:01,398 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1198 transitions. [2022-01-18 15:14:01,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:01,398 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1198 transitions. [2022-01-18 15:14:01,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:01,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:01,399 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:01,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:01,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 15:14:01,615 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash 839428162, now seen corresponding path program 17 times [2022-01-18 15:14:01,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:01,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566228159] [2022-01-18 15:14:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:01,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:01,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566228159] [2022-01-18 15:14:01,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566228159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857046143] [2022-01-18 15:14:01,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:01,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:01,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:01,714 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:01,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 15:14:01,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:01,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:01,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:01,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:01,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:14:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:01,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:02,055 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:02,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:02,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857046143] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:02,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:02,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:14:02,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770630243] [2022-01-18 15:14:02,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:02,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:02,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:02,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:02,080 INFO L87 Difference]: Start difference. First operand 385 states and 1198 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:02,519 INFO L93 Difference]: Finished difference Result 580 states and 1697 transitions. [2022-01-18 15:14:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:14:02,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:02,521 INFO L225 Difference]: With dead ends: 580 [2022-01-18 15:14:02,521 INFO L226 Difference]: Without dead ends: 574 [2022-01-18 15:14:02,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:14:02,522 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 164 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:02,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 177 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-18 15:14:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 382. [2022-01-18 15:14:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.115485564304462) internal successors, (1187), 381 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1187 transitions. [2022-01-18 15:14:02,528 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1187 transitions. Word has length 20 [2022-01-18 15:14:02,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:02,528 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1187 transitions. [2022-01-18 15:14:02,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1187 transitions. [2022-01-18 15:14:02,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:02,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:02,529 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:02,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:02,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:02,733 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:02,733 INFO L85 PathProgramCache]: Analyzing trace with hash 304198360, now seen corresponding path program 18 times [2022-01-18 15:14:02,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:02,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906497301] [2022-01-18 15:14:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:02,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:02,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:02,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906497301] [2022-01-18 15:14:02,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906497301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:02,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016499085] [2022-01-18 15:14:02,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:02,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:02,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:02,809 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:02,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 15:14:02,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:14:02,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:02,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:02,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:02,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:03,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:03,116 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:03,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:03,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016499085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:03,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:03,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:14:03,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798166483] [2022-01-18 15:14:03,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:03,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:03,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:03,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:03,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:03,141 INFO L87 Difference]: Start difference. First operand 382 states and 1187 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:03,508 INFO L93 Difference]: Finished difference Result 538 states and 1602 transitions. [2022-01-18 15:14:03,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:03,510 INFO L225 Difference]: With dead ends: 538 [2022-01-18 15:14:03,510 INFO L226 Difference]: Without dead ends: 526 [2022-01-18 15:14:03,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:14:03,510 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:03,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 142 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-18 15:14:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 382. [2022-01-18 15:14:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.1076115485564304) internal successors, (1184), 381 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1184 transitions. [2022-01-18 15:14:03,517 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1184 transitions. Word has length 20 [2022-01-18 15:14:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:03,518 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1184 transitions. [2022-01-18 15:14:03,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:03,518 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1184 transitions. [2022-01-18 15:14:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:03,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:03,519 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:03,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-18 15:14:03,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:03,735 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:03,735 INFO L85 PathProgramCache]: Analyzing trace with hash -928447552, now seen corresponding path program 19 times [2022-01-18 15:14:03,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:03,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196112805] [2022-01-18 15:14:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:03,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:03,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:03,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196112805] [2022-01-18 15:14:03,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196112805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:03,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571711691] [2022-01-18 15:14:03,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:03,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:03,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:03,820 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:03,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 15:14:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:03,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:03,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:04,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:14:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:04,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:04,239 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:04,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:04,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571711691] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:04,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:04,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:04,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044688250] [2022-01-18 15:14:04,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:04,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:04,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:04,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:04,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:04,261 INFO L87 Difference]: Start difference. First operand 382 states and 1184 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:04,725 INFO L93 Difference]: Finished difference Result 628 states and 1827 transitions. [2022-01-18 15:14:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:04,726 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:04,728 INFO L225 Difference]: With dead ends: 628 [2022-01-18 15:14:04,728 INFO L226 Difference]: Without dead ends: 628 [2022-01-18 15:14:04,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:14:04,729 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 214 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:04,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 173 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-18 15:14:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 391. [2022-01-18 15:14:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.1205128205128205) internal successors, (1217), 390 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1217 transitions. [2022-01-18 15:14:04,735 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1217 transitions. Word has length 20 [2022-01-18 15:14:04,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:04,735 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1217 transitions. [2022-01-18 15:14:04,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:04,736 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1217 transitions. [2022-01-18 15:14:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:04,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:04,737 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:04,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:04,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:04,947 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:04,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash -46370118, now seen corresponding path program 20 times [2022-01-18 15:14:04,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:04,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519572417] [2022-01-18 15:14:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:04,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:05,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:05,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519572417] [2022-01-18 15:14:05,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519572417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:05,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190930180] [2022-01-18 15:14:05,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:05,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:05,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:05,029 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:05,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 15:14:05,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:05,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:05,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:14:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:05,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:05,391 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:05,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:05,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190930180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:05,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:05,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:14:05,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443895392] [2022-01-18 15:14:05,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:05,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:14:05,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:05,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:14:05,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:14:05,411 INFO L87 Difference]: Start difference. First operand 391 states and 1217 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:05,858 INFO L93 Difference]: Finished difference Result 634 states and 1834 transitions. [2022-01-18 15:14:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:14:05,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:05,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:05,861 INFO L225 Difference]: With dead ends: 634 [2022-01-18 15:14:05,861 INFO L226 Difference]: Without dead ends: 628 [2022-01-18 15:14:05,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:14:05,861 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:05,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 222 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:05,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-18 15:14:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 388. [2022-01-18 15:14:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.116279069767442) internal successors, (1206), 387 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1206 transitions. [2022-01-18 15:14:05,868 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1206 transitions. Word has length 20 [2022-01-18 15:14:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:05,868 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1206 transitions. [2022-01-18 15:14:05,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1206 transitions. [2022-01-18 15:14:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:05,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:05,869 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:05,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:06,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-18 15:14:06,071 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:06,072 INFO L85 PathProgramCache]: Analyzing trace with hash -581599920, now seen corresponding path program 21 times [2022-01-18 15:14:06,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:06,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921648409] [2022-01-18 15:14:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:06,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:06,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:06,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921648409] [2022-01-18 15:14:06,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921648409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:06,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910389382] [2022-01-18 15:14:06,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:06,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:06,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:06,137 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:06,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 15:14:06,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:14:06,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:06,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:06,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:06,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:06,457 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:06,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:06,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910389382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:06,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:06,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:14:06,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137184460] [2022-01-18 15:14:06,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:06,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:14:06,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:06,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:14:06,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:14:06,485 INFO L87 Difference]: Start difference. First operand 388 states and 1206 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:06,816 INFO L93 Difference]: Finished difference Result 598 states and 1752 transitions. [2022-01-18 15:14:06,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:06,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:06,818 INFO L225 Difference]: With dead ends: 598 [2022-01-18 15:14:06,818 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 15:14:06,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:06,819 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 119 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:06,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 143 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 15:14:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 385. [2022-01-18 15:14:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.1119791666666665) internal successors, (1195), 384 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1195 transitions. [2022-01-18 15:14:06,825 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1195 transitions. Word has length 20 [2022-01-18 15:14:06,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:06,825 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1195 transitions. [2022-01-18 15:14:06,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1195 transitions. [2022-01-18 15:14:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:06,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:06,826 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:06,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:07,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 15:14:07,039 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1594292452, now seen corresponding path program 22 times [2022-01-18 15:14:07,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:07,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448202531] [2022-01-18 15:14:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:07,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:07,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:07,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448202531] [2022-01-18 15:14:07,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448202531] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:07,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304539533] [2022-01-18 15:14:07,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:07,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:07,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:07,100 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:07,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 15:14:07,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:07,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:07,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:07,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:07,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:07,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:07,356 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:07,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:07,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304539533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:07,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:07,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 15:14:07,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045723049] [2022-01-18 15:14:07,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:07,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:14:07,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:14:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:14:07,380 INFO L87 Difference]: Start difference. First operand 385 states and 1195 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:07,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:07,653 INFO L93 Difference]: Finished difference Result 589 states and 1728 transitions. [2022-01-18 15:14:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:07,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:07,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:07,655 INFO L225 Difference]: With dead ends: 589 [2022-01-18 15:14:07,655 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 15:14:07,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:14:07,656 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 92 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:07,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 142 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:14:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 15:14:07,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 385. [2022-01-18 15:14:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.1041666666666665) internal successors, (1192), 384 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1192 transitions. [2022-01-18 15:14:07,662 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1192 transitions. Word has length 20 [2022-01-18 15:14:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:07,662 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1192 transitions. [2022-01-18 15:14:07,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1192 transitions. [2022-01-18 15:14:07,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:07,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:07,663 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:07,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:07,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:07,867 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:07,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:07,868 INFO L85 PathProgramCache]: Analyzing trace with hash 372704001, now seen corresponding path program 23 times [2022-01-18 15:14:07,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:07,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274264491] [2022-01-18 15:14:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:07,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:07,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:07,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274264491] [2022-01-18 15:14:07,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274264491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:07,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604898366] [2022-01-18 15:14:07,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:07,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:07,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:07,914 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:07,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 15:14:07,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:07,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:07,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:07,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:08,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:14:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:08,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:08,184 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:08,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:14:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:08,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604898366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:08,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:08,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 15:14:08,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772369021] [2022-01-18 15:14:08,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:08,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:14:08,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:08,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:14:08,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:14:08,190 INFO L87 Difference]: Start difference. First operand 385 states and 1192 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:08,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:08,479 INFO L93 Difference]: Finished difference Result 610 states and 1822 transitions. [2022-01-18 15:14:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:08,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:08,481 INFO L225 Difference]: With dead ends: 610 [2022-01-18 15:14:08,481 INFO L226 Difference]: Without dead ends: 558 [2022-01-18 15:14:08,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:08,482 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:08,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 216 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-18 15:14:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 381. [2022-01-18 15:14:08,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.126315789473684) internal successors, (1188), 380 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1188 transitions. [2022-01-18 15:14:08,488 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1188 transitions. Word has length 20 [2022-01-18 15:14:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:08,488 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1188 transitions. [2022-01-18 15:14:08,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1188 transitions. [2022-01-18 15:14:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:08,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:08,489 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:08,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:08,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:08,695 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:08,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1590856260, now seen corresponding path program 24 times [2022-01-18 15:14:08,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371007855] [2022-01-18 15:14:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:08,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:08,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:08,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371007855] [2022-01-18 15:14:08,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371007855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:08,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383414167] [2022-01-18 15:14:08,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:08,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:08,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:08,798 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:08,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 15:14:08,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:14:08,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:08,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:08,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:08,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:09,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:09,106 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:09,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:09,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383414167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:09,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:09,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:14:09,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104245813] [2022-01-18 15:14:09,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:09,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:09,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:09,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:09,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:09,125 INFO L87 Difference]: Start difference. First operand 381 states and 1188 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:09,550 INFO L93 Difference]: Finished difference Result 621 states and 1829 transitions. [2022-01-18 15:14:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:09,553 INFO L225 Difference]: With dead ends: 621 [2022-01-18 15:14:09,553 INFO L226 Difference]: Without dead ends: 621 [2022-01-18 15:14:09,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:14:09,553 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 142 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:09,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 205 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-18 15:14:09,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 391. [2022-01-18 15:14:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.112820512820513) internal successors, (1214), 390 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1214 transitions. [2022-01-18 15:14:09,560 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1214 transitions. Word has length 20 [2022-01-18 15:14:09,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:09,560 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1214 transitions. [2022-01-18 15:14:09,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:09,560 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1214 transitions. [2022-01-18 15:14:09,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:09,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:09,561 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:09,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 15:14:09,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 15:14:09,777 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:09,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:09,777 INFO L85 PathProgramCache]: Analyzing trace with hash -679229046, now seen corresponding path program 25 times [2022-01-18 15:14:09,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:09,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460820968] [2022-01-18 15:14:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:09,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:09,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:09,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460820968] [2022-01-18 15:14:09,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460820968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:09,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25068540] [2022-01-18 15:14:09,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:09,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:09,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:09,865 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:09,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 15:14:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:09,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:09,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:10,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:10,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:10,230 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:10,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:10,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25068540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:10,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:10,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:10,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832548927] [2022-01-18 15:14:10,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:10,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:10,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:10,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:10,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:10,250 INFO L87 Difference]: Start difference. First operand 391 states and 1214 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:10,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:10,707 INFO L93 Difference]: Finished difference Result 673 states and 1950 transitions. [2022-01-18 15:14:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:10,708 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:10,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:10,710 INFO L225 Difference]: With dead ends: 673 [2022-01-18 15:14:10,710 INFO L226 Difference]: Without dead ends: 673 [2022-01-18 15:14:10,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:14:10,711 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 134 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:10,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 229 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-18 15:14:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 394. [2022-01-18 15:14:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.1170483460559795) internal successors, (1225), 393 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1225 transitions. [2022-01-18 15:14:10,717 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1225 transitions. Word has length 20 [2022-01-18 15:14:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:10,718 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1225 transitions. [2022-01-18 15:14:10,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1225 transitions. [2022-01-18 15:14:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:10,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:10,719 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:10,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 15:14:10,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 15:14:10,935 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash 202848388, now seen corresponding path program 26 times [2022-01-18 15:14:10,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:10,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139602766] [2022-01-18 15:14:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:10,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:11,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:11,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139602766] [2022-01-18 15:14:11,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139602766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:11,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573389735] [2022-01-18 15:14:11,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:11,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:11,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:11,023 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:11,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 15:14:11,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:11,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:11,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:11,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:11,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:11,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:11,355 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:11,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:11,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573389735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:11,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:11,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:14:11,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252362170] [2022-01-18 15:14:11,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:11,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:11,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:11,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:11,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:11,397 INFO L87 Difference]: Start difference. First operand 394 states and 1225 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:11,772 INFO L93 Difference]: Finished difference Result 630 states and 1847 transitions. [2022-01-18 15:14:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:11,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:11,774 INFO L225 Difference]: With dead ends: 630 [2022-01-18 15:14:11,775 INFO L226 Difference]: Without dead ends: 624 [2022-01-18 15:14:11,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:14:11,775 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:11,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 164 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-18 15:14:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 386. [2022-01-18 15:14:11,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.1194805194805193) internal successors, (1201), 385 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:11,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1201 transitions. [2022-01-18 15:14:11,781 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1201 transitions. Word has length 20 [2022-01-18 15:14:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:11,781 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1201 transitions. [2022-01-18 15:14:11,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:11,782 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1201 transitions. [2022-01-18 15:14:11,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:11,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:11,782 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:11,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:11,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 15:14:11,998 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:11,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1185575312, now seen corresponding path program 27 times [2022-01-18 15:14:11,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:11,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910624676] [2022-01-18 15:14:11,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:11,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:12,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:12,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910624676] [2022-01-18 15:14:12,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910624676] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:12,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171171834] [2022-01-18 15:14:12,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:12,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:12,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:12,110 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:12,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 15:14:12,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:14:12,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:12,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:12,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:12,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:14:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:12,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:12,512 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:12,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:12,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171171834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:12,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:12,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:12,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736797970] [2022-01-18 15:14:12,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:12,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:12,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:12,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:12,539 INFO L87 Difference]: Start difference. First operand 386 states and 1201 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:12,936 INFO L93 Difference]: Finished difference Result 599 states and 1763 transitions. [2022-01-18 15:14:12,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:12,936 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:12,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:12,938 INFO L225 Difference]: With dead ends: 599 [2022-01-18 15:14:12,938 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 15:14:12,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:12,939 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 158 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:12,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 158 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 15:14:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 392. [2022-01-18 15:14:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.1278772378516626) internal successors, (1223), 391 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1223 transitions. [2022-01-18 15:14:12,945 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1223 transitions. Word has length 20 [2022-01-18 15:14:12,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:12,945 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1223 transitions. [2022-01-18 15:14:12,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1223 transitions. [2022-01-18 15:14:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:12,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:12,946 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:12,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 15:14:13,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 15:14:13,155 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:13,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash -303497878, now seen corresponding path program 28 times [2022-01-18 15:14:13,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:13,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937715651] [2022-01-18 15:14:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:13,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:13,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937715651] [2022-01-18 15:14:13,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937715651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552064337] [2022-01-18 15:14:13,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:13,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:13,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:13,251 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:13,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 15:14:13,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:13,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:13,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:13,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:13,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:14:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:13,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:13,636 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:13,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:13,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552064337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:13,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:13,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:13,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185190207] [2022-01-18 15:14:13,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:13,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:13,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:13,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:13,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:13,656 INFO L87 Difference]: Start difference. First operand 392 states and 1223 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:14,118 INFO L93 Difference]: Finished difference Result 605 states and 1770 transitions. [2022-01-18 15:14:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:14:14,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:14,120 INFO L225 Difference]: With dead ends: 605 [2022-01-18 15:14:14,120 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 15:14:14,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:14,121 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 150 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:14,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 171 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 15:14:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 389. [2022-01-18 15:14:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.1237113402061856) internal successors, (1212), 388 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1212 transitions. [2022-01-18 15:14:14,128 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1212 transitions. Word has length 20 [2022-01-18 15:14:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:14,128 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1212 transitions. [2022-01-18 15:14:14,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1212 transitions. [2022-01-18 15:14:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:14,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:14,129 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:14,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:14,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:14,344 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:14,344 INFO L85 PathProgramCache]: Analyzing trace with hash -838727680, now seen corresponding path program 29 times [2022-01-18 15:14:14,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:14,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581795008] [2022-01-18 15:14:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:14,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:14,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581795008] [2022-01-18 15:14:14,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581795008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999134705] [2022-01-18 15:14:14,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:14,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:14,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:14,445 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:14,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 15:14:14,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:14,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:14,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:14,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:14,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:14,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:14,805 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:14,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:14,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999134705] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:14,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:14,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:14,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372803840] [2022-01-18 15:14:14,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:14,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:14,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:14,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:14,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:14,829 INFO L87 Difference]: Start difference. First operand 389 states and 1212 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:15,293 INFO L93 Difference]: Finished difference Result 563 states and 1675 transitions. [2022-01-18 15:14:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:15,294 INFO L225 Difference]: With dead ends: 563 [2022-01-18 15:14:15,294 INFO L226 Difference]: Without dead ends: 551 [2022-01-18 15:14:15,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:14:15,295 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 115 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:15,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 242 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-18 15:14:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 381. [2022-01-18 15:14:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.126315789473684) internal successors, (1188), 380 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1188 transitions. [2022-01-18 15:14:15,301 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1188 transitions. Word has length 20 [2022-01-18 15:14:15,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:15,301 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1188 transitions. [2022-01-18 15:14:15,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1188 transitions. [2022-01-18 15:14:15,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:15,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:15,302 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:15,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:15,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:15,503 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:15,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2145298973, now seen corresponding path program 30 times [2022-01-18 15:14:15,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:15,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582011683] [2022-01-18 15:14:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:15,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:15,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:15,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582011683] [2022-01-18 15:14:15,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582011683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:15,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377406150] [2022-01-18 15:14:15,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:15,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:15,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:15,556 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:15,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 15:14:15,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:14:15,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:15,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:15,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:15,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:14:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:15,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:15,869 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:15,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:14:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:15,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377406150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:15,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:15,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 15:14:15,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319010637] [2022-01-18 15:14:15,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:15,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:14:15,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:15,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:14:15,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:14:15,875 INFO L87 Difference]: Start difference. First operand 381 states and 1188 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:16,130 INFO L93 Difference]: Finished difference Result 537 states and 1633 transitions. [2022-01-18 15:14:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:16,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:16,132 INFO L225 Difference]: With dead ends: 537 [2022-01-18 15:14:16,132 INFO L226 Difference]: Without dead ends: 485 [2022-01-18 15:14:16,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:16,132 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 110 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:16,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 173 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-18 15:14:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 381. [2022-01-18 15:14:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.126315789473684) internal successors, (1188), 380 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1188 transitions. [2022-01-18 15:14:16,138 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1188 transitions. Word has length 20 [2022-01-18 15:14:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:16,138 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1188 transitions. [2022-01-18 15:14:16,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1188 transitions. [2022-01-18 15:14:16,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:16,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:16,139 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:16,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:16,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-18 15:14:16,354 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:16,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash 628623098, now seen corresponding path program 31 times [2022-01-18 15:14:16,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:16,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696476626] [2022-01-18 15:14:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:16,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:16,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:16,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696476626] [2022-01-18 15:14:16,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696476626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:16,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009492728] [2022-01-18 15:14:16,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:16,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:16,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:16,457 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:16,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 15:14:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:16,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:16,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:14:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:16,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:16,829 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:16,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:16,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009492728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:16,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:16,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:14:16,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346394638] [2022-01-18 15:14:16,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:16,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:16,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:16,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:16,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:16,848 INFO L87 Difference]: Start difference. First operand 381 states and 1188 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:17,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:17,371 INFO L93 Difference]: Finished difference Result 746 states and 2167 transitions. [2022-01-18 15:14:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:17,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:17,373 INFO L225 Difference]: With dead ends: 746 [2022-01-18 15:14:17,373 INFO L226 Difference]: Without dead ends: 746 [2022-01-18 15:14:17,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:14:17,373 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 175 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:17,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 227 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-01-18 15:14:17,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 395. [2022-01-18 15:14:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.1446700507614214) internal successors, (1239), 394 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1239 transitions. [2022-01-18 15:14:17,380 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1239 transitions. Word has length 20 [2022-01-18 15:14:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:17,380 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1239 transitions. [2022-01-18 15:14:17,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1239 transitions. [2022-01-18 15:14:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:17,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:17,381 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:17,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:17,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:17,581 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1641462208, now seen corresponding path program 32 times [2022-01-18 15:14:17,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:17,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372137] [2022-01-18 15:14:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:17,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:17,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:17,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372137] [2022-01-18 15:14:17,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:17,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535269502] [2022-01-18 15:14:17,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:17,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:17,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:17,674 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:17,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 15:14:17,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:17,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:17,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:17,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:14:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:17,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:18,055 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:18,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:18,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535269502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:18,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:18,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:18,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128412390] [2022-01-18 15:14:18,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:18,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:18,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:18,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:18,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:18,076 INFO L87 Difference]: Start difference. First operand 395 states and 1239 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:18,518 INFO L93 Difference]: Finished difference Result 798 states and 2288 transitions. [2022-01-18 15:14:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:18,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:18,519 INFO L225 Difference]: With dead ends: 798 [2022-01-18 15:14:18,519 INFO L226 Difference]: Without dead ends: 798 [2022-01-18 15:14:18,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:14:18,520 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 211 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:18,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 197 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-01-18 15:14:18,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 401. [2022-01-18 15:14:18,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.16) internal successors, (1264), 400 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:18,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1264 transitions. [2022-01-18 15:14:18,527 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1264 transitions. Word has length 20 [2022-01-18 15:14:18,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:18,527 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1264 transitions. [2022-01-18 15:14:18,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1264 transitions. [2022-01-18 15:14:18,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:18,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:18,528 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:18,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 15:14:18,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:18,740 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:18,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:18,741 INFO L85 PathProgramCache]: Analyzing trace with hash -759384774, now seen corresponding path program 33 times [2022-01-18 15:14:18,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:18,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669169948] [2022-01-18 15:14:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:18,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:18,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:18,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669169948] [2022-01-18 15:14:18,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669169948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:18,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926469231] [2022-01-18 15:14:18,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:18,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:18,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:18,832 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:18,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 15:14:18,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:14:18,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:18,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:18,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:18,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:14:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:19,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:19,203 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:19,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:19,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926469231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:19,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:19,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:14:19,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976802831] [2022-01-18 15:14:19,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:19,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:19,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:19,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:19,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:19,227 INFO L87 Difference]: Start difference. First operand 401 states and 1264 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:19,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:19,680 INFO L93 Difference]: Finished difference Result 755 states and 2179 transitions. [2022-01-18 15:14:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:19,680 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:19,682 INFO L225 Difference]: With dead ends: 755 [2022-01-18 15:14:19,682 INFO L226 Difference]: Without dead ends: 749 [2022-01-18 15:14:19,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:14:19,682 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 216 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:19,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 208 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-18 15:14:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 399. [2022-01-18 15:14:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.148241206030151) internal successors, (1253), 398 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1253 transitions. [2022-01-18 15:14:19,689 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1253 transitions. Word has length 20 [2022-01-18 15:14:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:19,689 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1253 transitions. [2022-01-18 15:14:19,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1253 transitions. [2022-01-18 15:14:19,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:19,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:19,690 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:19,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:19,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-18 15:14:19,903 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:19,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:19,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1293154303, now seen corresponding path program 34 times [2022-01-18 15:14:19,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:19,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492947487] [2022-01-18 15:14:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:19,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:19,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:19,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492947487] [2022-01-18 15:14:19,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492947487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:19,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189368836] [2022-01-18 15:14:19,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:19,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:19,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:19,960 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:19,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 15:14:20,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:20,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:20,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:20,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:20,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:20,312 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:20,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:14:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:20,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189368836] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:20,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:20,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 15:14:20,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407670966] [2022-01-18 15:14:20,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:20,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:14:20,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:20,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:14:20,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:14:20,320 INFO L87 Difference]: Start difference. First operand 399 states and 1253 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:20,589 INFO L93 Difference]: Finished difference Result 594 states and 1787 transitions. [2022-01-18 15:14:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:20,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:20,591 INFO L225 Difference]: With dead ends: 594 [2022-01-18 15:14:20,591 INFO L226 Difference]: Without dead ends: 542 [2022-01-18 15:14:20,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:20,591 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 139 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:20,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 154 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:20,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-18 15:14:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 402. [2022-01-18 15:14:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.162094763092269) internal successors, (1268), 401 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1268 transitions. [2022-01-18 15:14:20,597 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1268 transitions. Word has length 20 [2022-01-18 15:14:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:20,597 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1268 transitions. [2022-01-18 15:14:20,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1268 transitions. [2022-01-18 15:14:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:20,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:20,598 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:20,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:20,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 15:14:20,799 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:20,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2121603972, now seen corresponding path program 35 times [2022-01-18 15:14:20,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:20,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891531036] [2022-01-18 15:14:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:20,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:20,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:20,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891531036] [2022-01-18 15:14:20,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891531036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:20,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524624703] [2022-01-18 15:14:20,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:20,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:20,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:20,924 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:20,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 15:14:20,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:14:20,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:20,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:20,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:21,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:14:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:21,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:21,292 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:21,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:21,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524624703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:21,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:21,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:21,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405561788] [2022-01-18 15:14:21,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:21,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:21,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:21,312 INFO L87 Difference]: Start difference. First operand 402 states and 1268 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:21,750 INFO L93 Difference]: Finished difference Result 709 states and 2075 transitions. [2022-01-18 15:14:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:21,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:21,752 INFO L225 Difference]: With dead ends: 709 [2022-01-18 15:14:21,752 INFO L226 Difference]: Without dead ends: 709 [2022-01-18 15:14:21,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:14:21,752 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 164 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:21,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 189 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-18 15:14:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 388. [2022-01-18 15:14:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.160206718346253) internal successors, (1223), 387 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1223 transitions. [2022-01-18 15:14:21,759 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1223 transitions. Word has length 20 [2022-01-18 15:14:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:21,759 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1223 transitions. [2022-01-18 15:14:21,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1223 transitions. [2022-01-18 15:14:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:21,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:21,760 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:21,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:21,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 15:14:21,960 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:21,960 INFO L85 PathProgramCache]: Analyzing trace with hash -962204864, now seen corresponding path program 36 times [2022-01-18 15:14:21,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:21,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133714206] [2022-01-18 15:14:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:21,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:22,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:22,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133714206] [2022-01-18 15:14:22,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133714206] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:22,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770176999] [2022-01-18 15:14:22,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:22,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:22,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:22,063 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:22,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 15:14:22,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:14:22,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:22,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:22,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:22,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:14:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:22,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:22,477 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:22,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:22,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770176999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:22,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:22,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:22,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177889949] [2022-01-18 15:14:22,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:22,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:22,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:22,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:22,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:22,501 INFO L87 Difference]: Start difference. First operand 388 states and 1223 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:23,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:23,111 INFO L93 Difference]: Finished difference Result 705 states and 2059 transitions. [2022-01-18 15:14:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:14:23,112 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:23,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:23,113 INFO L225 Difference]: With dead ends: 705 [2022-01-18 15:14:23,113 INFO L226 Difference]: Without dead ends: 705 [2022-01-18 15:14:23,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:14:23,113 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 202 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:23,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 276 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-01-18 15:14:23,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 395. [2022-01-18 15:14:23,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.1776649746192893) internal successors, (1252), 394 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:23,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1252 transitions. [2022-01-18 15:14:23,120 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1252 transitions. Word has length 20 [2022-01-18 15:14:23,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:23,120 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1252 transitions. [2022-01-18 15:14:23,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:23,120 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1252 transitions. [2022-01-18 15:14:23,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:23,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:23,121 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:23,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:23,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:23,323 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:23,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:23,324 INFO L85 PathProgramCache]: Analyzing trace with hash 311949990, now seen corresponding path program 37 times [2022-01-18 15:14:23,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:23,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200311776] [2022-01-18 15:14:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:23,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:23,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:23,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200311776] [2022-01-18 15:14:23,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200311776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:23,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646217416] [2022-01-18 15:14:23,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:23,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:23,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:23,446 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:23,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 15:14:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:23,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:23,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:23,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:14:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:23,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:23,863 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:23,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:23,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646217416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:23,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:23,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:23,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632021441] [2022-01-18 15:14:23,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:23,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:23,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:23,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:23,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:23,883 INFO L87 Difference]: Start difference. First operand 395 states and 1252 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:24,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:24,321 INFO L93 Difference]: Finished difference Result 643 states and 1916 transitions. [2022-01-18 15:14:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:24,321 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:24,322 INFO L225 Difference]: With dead ends: 643 [2022-01-18 15:14:24,322 INFO L226 Difference]: Without dead ends: 643 [2022-01-18 15:14:24,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:24,323 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:24,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 194 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:24,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-18 15:14:24,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 395. [2022-01-18 15:14:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.1776649746192893) internal successors, (1252), 394 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:24,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1252 transitions. [2022-01-18 15:14:24,329 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1252 transitions. Word has length 20 [2022-01-18 15:14:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:24,329 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1252 transitions. [2022-01-18 15:14:24,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1252 transitions. [2022-01-18 15:14:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:24,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:24,330 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:24,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 15:14:24,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 15:14:24,531 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:24,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:24,531 INFO L85 PathProgramCache]: Analyzing trace with hash -305662691, now seen corresponding path program 38 times [2022-01-18 15:14:24,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:24,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760288636] [2022-01-18 15:14:24,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:24,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:24,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:24,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760288636] [2022-01-18 15:14:24,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760288636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:24,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736242853] [2022-01-18 15:14:24,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:24,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:24,582 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:24,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 15:14:24,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:24,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:24,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:24,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:24,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:24,894 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:24,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:14:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:24,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736242853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:24,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:24,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 15:14:24,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555833140] [2022-01-18 15:14:24,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:24,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:14:24,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:24,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:14:24,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:14:24,900 INFO L87 Difference]: Start difference. First operand 395 states and 1252 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:25,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:25,192 INFO L93 Difference]: Finished difference Result 506 states and 1539 transitions. [2022-01-18 15:14:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:25,192 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:25,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:25,195 INFO L225 Difference]: With dead ends: 506 [2022-01-18 15:14:25,195 INFO L226 Difference]: Without dead ends: 444 [2022-01-18 15:14:25,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:25,195 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 112 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:25,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 178 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:25,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-18 15:14:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 386. [2022-01-18 15:14:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.1454545454545455) internal successors, (1211), 385 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1211 transitions. [2022-01-18 15:14:25,200 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1211 transitions. Word has length 20 [2022-01-18 15:14:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:25,200 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1211 transitions. [2022-01-18 15:14:25,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1211 transitions. [2022-01-18 15:14:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:25,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:25,201 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:25,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:25,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 15:14:25,409 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:25,409 INFO L85 PathProgramCache]: Analyzing trace with hash -439149840, now seen corresponding path program 39 times [2022-01-18 15:14:25,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:25,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169634108] [2022-01-18 15:14:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:25,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:25,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:25,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169634108] [2022-01-18 15:14:25,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169634108] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:25,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549820603] [2022-01-18 15:14:25,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:25,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:25,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:25,512 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:25,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 15:14:25,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:14:25,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:25,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:25,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:25,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:14:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:25,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:25,953 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:25,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:25,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549820603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:25,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:25,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:25,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457817322] [2022-01-18 15:14:25,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:25,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:25,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:25,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:25,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:25,977 INFO L87 Difference]: Start difference. First operand 386 states and 1211 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:26,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:26,459 INFO L93 Difference]: Finished difference Result 743 states and 2170 transitions. [2022-01-18 15:14:26,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:26,460 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:26,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:26,461 INFO L225 Difference]: With dead ends: 743 [2022-01-18 15:14:26,461 INFO L226 Difference]: Without dead ends: 743 [2022-01-18 15:14:26,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:26,462 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 208 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:26,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 204 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-18 15:14:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 394. [2022-01-18 15:14:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.173027989821883) internal successors, (1247), 393 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:26,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1247 transitions. [2022-01-18 15:14:26,468 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1247 transitions. Word has length 20 [2022-01-18 15:14:26,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:26,468 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1247 transitions. [2022-01-18 15:14:26,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:26,468 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1247 transitions. [2022-01-18 15:14:26,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:26,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:26,469 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:26,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 15:14:26,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:26,669 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:26,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash 442927594, now seen corresponding path program 40 times [2022-01-18 15:14:26,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:26,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568214354] [2022-01-18 15:14:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:26,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:26,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:26,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568214354] [2022-01-18 15:14:26,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568214354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:26,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213746505] [2022-01-18 15:14:26,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:26,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:26,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:26,782 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:26,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 15:14:26,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:26,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:26,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:26,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:26,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:14:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:27,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:27,205 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:27,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:27,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213746505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:27,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:27,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:27,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408050822] [2022-01-18 15:14:27,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:27,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:27,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:27,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:27,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:27,226 INFO L87 Difference]: Start difference. First operand 394 states and 1247 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:27,850 INFO L93 Difference]: Finished difference Result 867 states and 2519 transitions. [2022-01-18 15:14:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:14:27,850 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:27,852 INFO L225 Difference]: With dead ends: 867 [2022-01-18 15:14:27,852 INFO L226 Difference]: Without dead ends: 861 [2022-01-18 15:14:27,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:14:27,852 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 268 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:27,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 218 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-18 15:14:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 407. [2022-01-18 15:14:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.184729064039409) internal successors, (1293), 406 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1293 transitions. [2022-01-18 15:14:27,860 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1293 transitions. Word has length 20 [2022-01-18 15:14:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:27,860 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1293 transitions. [2022-01-18 15:14:27,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1293 transitions. [2022-01-18 15:14:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:27,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:27,861 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:27,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 15:14:28,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 15:14:28,061 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:28,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:28,061 INFO L85 PathProgramCache]: Analyzing trace with hash 301747494, now seen corresponding path program 41 times [2022-01-18 15:14:28,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:28,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177377139] [2022-01-18 15:14:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:28,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:28,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:28,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177377139] [2022-01-18 15:14:28,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177377139] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:28,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255968428] [2022-01-18 15:14:28,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:28,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:28,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:28,188 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:28,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 15:14:28,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:14:28,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:28,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:28,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:28,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:14:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:28,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:28,636 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:28,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:28,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255968428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:28,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:28,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:28,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019628649] [2022-01-18 15:14:28,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:28,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:28,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:28,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:28,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:28,655 INFO L87 Difference]: Start difference. First operand 407 states and 1293 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:29,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:29,281 INFO L93 Difference]: Finished difference Result 790 states and 2291 transitions. [2022-01-18 15:14:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:14:29,282 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:29,283 INFO L225 Difference]: With dead ends: 790 [2022-01-18 15:14:29,283 INFO L226 Difference]: Without dead ends: 790 [2022-01-18 15:14:29,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:14:29,284 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 221 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:29,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 235 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-01-18 15:14:29,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 406. [2022-01-18 15:14:29,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.180246913580247) internal successors, (1288), 405 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1288 transitions. [2022-01-18 15:14:29,291 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1288 transitions. Word has length 20 [2022-01-18 15:14:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:29,291 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1288 transitions. [2022-01-18 15:14:29,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1288 transitions. [2022-01-18 15:14:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:29,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:29,292 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:29,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:29,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:29,504 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1296123114, now seen corresponding path program 42 times [2022-01-18 15:14:29,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:29,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594447991] [2022-01-18 15:14:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:29,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:29,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:29,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594447991] [2022-01-18 15:14:29,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594447991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:29,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079182670] [2022-01-18 15:14:29,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:29,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:29,633 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:29,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 15:14:29,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:14:29,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:29,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:29,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:29,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:14:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:29,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:30,070 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:30,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:30,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079182670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:30,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:30,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:30,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071797982] [2022-01-18 15:14:30,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:30,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:30,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:30,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:30,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:30,091 INFO L87 Difference]: Start difference. First operand 406 states and 1288 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:30,594 INFO L93 Difference]: Finished difference Result 724 states and 2143 transitions. [2022-01-18 15:14:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:30,595 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:30,596 INFO L225 Difference]: With dead ends: 724 [2022-01-18 15:14:30,596 INFO L226 Difference]: Without dead ends: 724 [2022-01-18 15:14:30,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:30,597 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 126 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:30,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 223 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:30,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-18 15:14:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 403. [2022-01-18 15:14:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.1666666666666665) internal successors, (1273), 402 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1273 transitions. [2022-01-18 15:14:30,604 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1273 transitions. Word has length 20 [2022-01-18 15:14:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:30,604 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1273 transitions. [2022-01-18 15:14:30,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1273 transitions. [2022-01-18 15:14:30,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:30,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:30,604 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:30,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 15:14:30,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:30,820 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:30,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2018391050, now seen corresponding path program 43 times [2022-01-18 15:14:30,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:30,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537572699] [2022-01-18 15:14:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:30,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:30,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:30,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537572699] [2022-01-18 15:14:30,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537572699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:30,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21944861] [2022-01-18 15:14:30,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:30,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:30,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:30,925 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:30,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 15:14:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:30,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:30,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:31,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:14:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:31,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:31,329 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:31,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:31,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21944861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:31,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:31,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:31,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938785803] [2022-01-18 15:14:31,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:31,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:31,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:31,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:31,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:31,353 INFO L87 Difference]: Start difference. First operand 403 states and 1273 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:31,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:31,964 INFO L93 Difference]: Finished difference Result 696 states and 2045 transitions. [2022-01-18 15:14:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:14:31,964 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:31,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:31,966 INFO L225 Difference]: With dead ends: 696 [2022-01-18 15:14:31,966 INFO L226 Difference]: Without dead ends: 690 [2022-01-18 15:14:31,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:14:31,967 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 160 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:31,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 214 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:31,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-18 15:14:31,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 407. [2022-01-18 15:14:31,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.1699507389162562) internal successors, (1287), 406 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1287 transitions. [2022-01-18 15:14:31,975 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1287 transitions. Word has length 20 [2022-01-18 15:14:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:31,975 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1287 transitions. [2022-01-18 15:14:31,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1287 transitions. [2022-01-18 15:14:31,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:31,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:31,976 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:31,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:32,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 15:14:32,191 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:32,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:32,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1994491136, now seen corresponding path program 44 times [2022-01-18 15:14:32,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:32,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051053057] [2022-01-18 15:14:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:32,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:32,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:32,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051053057] [2022-01-18 15:14:32,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051053057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:32,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62369521] [2022-01-18 15:14:32,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:32,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:32,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:32,306 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:32,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 15:14:32,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:32,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:32,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:32,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:32,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:14:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:32,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:32,708 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:32,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:32,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62369521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:32,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:32,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:32,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565536496] [2022-01-18 15:14:32,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:32,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:32,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:32,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:32,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:32,733 INFO L87 Difference]: Start difference. First operand 407 states and 1287 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:33,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:33,159 INFO L93 Difference]: Finished difference Result 667 states and 1991 transitions. [2022-01-18 15:14:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:33,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:33,160 INFO L225 Difference]: With dead ends: 667 [2022-01-18 15:14:33,160 INFO L226 Difference]: Without dead ends: 667 [2022-01-18 15:14:33,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:33,161 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:33,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 180 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-18 15:14:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 405. [2022-01-18 15:14:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.1633663366336635) internal successors, (1278), 404 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1278 transitions. [2022-01-18 15:14:33,167 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1278 transitions. Word has length 20 [2022-01-18 15:14:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:33,168 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1278 transitions. [2022-01-18 15:14:33,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1278 transitions. [2022-01-18 15:14:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:33,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:33,168 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:33,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 15:14:33,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 15:14:33,369 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1726369728, now seen corresponding path program 45 times [2022-01-18 15:14:33,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:33,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070486764] [2022-01-18 15:14:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:33,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:33,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:33,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070486764] [2022-01-18 15:14:33,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070486764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:33,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046893605] [2022-01-18 15:14:33,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:33,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:33,479 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:33,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 15:14:33,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:14:33,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:33,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:33,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:33,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:14:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:33,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:34,009 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:34,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:34,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046893605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:34,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:34,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:34,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113168078] [2022-01-18 15:14:34,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:34,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:34,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:34,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:34,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:34,033 INFO L87 Difference]: Start difference. First operand 405 states and 1278 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:34,591 INFO L93 Difference]: Finished difference Result 626 states and 1879 transitions. [2022-01-18 15:14:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:34,592 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:34,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:34,593 INFO L225 Difference]: With dead ends: 626 [2022-01-18 15:14:34,593 INFO L226 Difference]: Without dead ends: 626 [2022-01-18 15:14:34,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:34,593 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 137 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:34,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 202 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:34,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-18 15:14:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 412. [2022-01-18 15:14:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.1751824817518246) internal successors, (1305), 411 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1305 transitions. [2022-01-18 15:14:34,600 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1305 transitions. Word has length 20 [2022-01-18 15:14:34,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:34,600 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1305 transitions. [2022-01-18 15:14:34,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1305 transitions. [2022-01-18 15:14:34,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:34,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:34,601 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:34,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 15:14:34,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 15:14:34,816 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1686520134, now seen corresponding path program 46 times [2022-01-18 15:14:34,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:34,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301742186] [2022-01-18 15:14:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:34,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:34,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:34,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301742186] [2022-01-18 15:14:34,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301742186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:34,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043735332] [2022-01-18 15:14:34,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:34,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:34,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:34,919 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:34,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 15:14:34,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:34,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:34,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:34,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:35,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:14:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:35,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:35,436 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:35,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:35,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043735332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:35,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:35,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:35,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476718868] [2022-01-18 15:14:35,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:35,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:35,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:35,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:35,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:35,456 INFO L87 Difference]: Start difference. First operand 412 states and 1305 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:36,021 INFO L93 Difference]: Finished difference Result 632 states and 1886 transitions. [2022-01-18 15:14:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:14:36,021 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:36,022 INFO L225 Difference]: With dead ends: 632 [2022-01-18 15:14:36,022 INFO L226 Difference]: Without dead ends: 626 [2022-01-18 15:14:36,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:36,023 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 154 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:36,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 175 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:36,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-18 15:14:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 409. [2022-01-18 15:14:36,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.1715686274509802) internal successors, (1294), 408 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1294 transitions. [2022-01-18 15:14:36,030 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1294 transitions. Word has length 20 [2022-01-18 15:14:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:36,030 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1294 transitions. [2022-01-18 15:14:36,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1294 transitions. [2022-01-18 15:14:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:36,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:36,031 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:36,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:36,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:36,243 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:36,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:36,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2073217360, now seen corresponding path program 47 times [2022-01-18 15:14:36,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:36,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013603407] [2022-01-18 15:14:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:36,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:36,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:36,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013603407] [2022-01-18 15:14:36,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013603407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:36,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128660374] [2022-01-18 15:14:36,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:36,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:36,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:36,362 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:36,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 15:14:36,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:36,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:36,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:36,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:36,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:36,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:36,842 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:36,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:36,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128660374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:36,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:36,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:36,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335818496] [2022-01-18 15:14:36,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:36,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:36,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:36,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:36,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:36,861 INFO L87 Difference]: Start difference. First operand 409 states and 1294 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:37,453 INFO L93 Difference]: Finished difference Result 596 states and 1804 transitions. [2022-01-18 15:14:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:37,455 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:37,456 INFO L225 Difference]: With dead ends: 596 [2022-01-18 15:14:37,456 INFO L226 Difference]: Without dead ends: 584 [2022-01-18 15:14:37,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:14:37,457 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 83 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:37,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 202 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-18 15:14:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 406. [2022-01-18 15:14:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.167901234567901) internal successors, (1283), 405 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1283 transitions. [2022-01-18 15:14:37,462 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1283 transitions. Word has length 20 [2022-01-18 15:14:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:37,462 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1283 transitions. [2022-01-18 15:14:37,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1283 transitions. [2022-01-18 15:14:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:37,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:37,463 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:37,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 15:14:37,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 15:14:37,664 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1075616694, now seen corresponding path program 48 times [2022-01-18 15:14:37,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:37,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392214443] [2022-01-18 15:14:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:37,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:37,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:37,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392214443] [2022-01-18 15:14:37,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392214443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:37,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455906086] [2022-01-18 15:14:37,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:37,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:37,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:37,798 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:37,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 15:14:37,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:14:37,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:37,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:37,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:38,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:14:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:38,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:38,347 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:38,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:38,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455906086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:38,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:38,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:38,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695282165] [2022-01-18 15:14:38,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:38,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:38,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:38,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:38,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:38,367 INFO L87 Difference]: Start difference. First operand 406 states and 1283 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:38,992 INFO L93 Difference]: Finished difference Result 710 states and 2089 transitions. [2022-01-18 15:14:38,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:14:38,992 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:38,993 INFO L225 Difference]: With dead ends: 710 [2022-01-18 15:14:38,993 INFO L226 Difference]: Without dead ends: 710 [2022-01-18 15:14:38,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:14:38,994 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 210 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:38,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 204 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-01-18 15:14:38,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 414. [2022-01-18 15:14:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.1937046004842613) internal successors, (1319), 413 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1319 transitions. [2022-01-18 15:14:39,001 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1319 transitions. Word has length 20 [2022-01-18 15:14:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:39,001 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1319 transitions. [2022-01-18 15:14:39,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1319 transitions. [2022-01-18 15:14:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:39,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:39,002 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:39,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 15:14:39,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 15:14:39,202 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:39,202 INFO L85 PathProgramCache]: Analyzing trace with hash -193539260, now seen corresponding path program 49 times [2022-01-18 15:14:39,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:39,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5074265] [2022-01-18 15:14:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:39,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:39,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:39,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5074265] [2022-01-18 15:14:39,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5074265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:39,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554695088] [2022-01-18 15:14:39,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:39,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:39,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:39,331 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:39,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 15:14:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:39,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:39,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:39,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-01-18 15:14:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:39,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:39,890 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:39,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:39,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554695088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:39,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:39,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:39,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499555567] [2022-01-18 15:14:39,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:39,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:39,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:39,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:39,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:39,913 INFO L87 Difference]: Start difference. First operand 414 states and 1319 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:40,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:40,583 INFO L93 Difference]: Finished difference Result 716 states and 2090 transitions. [2022-01-18 15:14:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:14:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:40,585 INFO L225 Difference]: With dead ends: 716 [2022-01-18 15:14:40,585 INFO L226 Difference]: Without dead ends: 710 [2022-01-18 15:14:40,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:14:40,586 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 226 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:40,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 233 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-01-18 15:14:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 411. [2022-01-18 15:14:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.1902439024390246) internal successors, (1308), 410 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1308 transitions. [2022-01-18 15:14:40,593 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1308 transitions. Word has length 20 [2022-01-18 15:14:40,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:40,593 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1308 transitions. [2022-01-18 15:14:40,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1308 transitions. [2022-01-18 15:14:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:40,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:40,594 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:40,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:40,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:40,809 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:40,810 INFO L85 PathProgramCache]: Analyzing trace with hash -334719360, now seen corresponding path program 50 times [2022-01-18 15:14:40,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:40,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189304210] [2022-01-18 15:14:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:40,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:40,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:40,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189304210] [2022-01-18 15:14:40,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189304210] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:40,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825532998] [2022-01-18 15:14:40,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:40,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:40,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:40,931 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:40,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 15:14:40,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:40,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:40,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:40,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:41,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-01-18 15:14:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:41,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:41,432 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:41,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:41,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825532998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:41,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:41,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:41,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026164321] [2022-01-18 15:14:41,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:41,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:41,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:41,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:41,451 INFO L87 Difference]: Start difference. First operand 411 states and 1308 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:42,063 INFO L93 Difference]: Finished difference Result 707 states and 2076 transitions. [2022-01-18 15:14:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:14:42,063 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:42,064 INFO L225 Difference]: With dead ends: 707 [2022-01-18 15:14:42,064 INFO L226 Difference]: Without dead ends: 707 [2022-01-18 15:14:42,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:14:42,065 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 158 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:42,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 205 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-01-18 15:14:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 410. [2022-01-18 15:14:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.1858190709046457) internal successors, (1303), 409 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1303 transitions. [2022-01-18 15:14:42,071 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1303 transitions. Word has length 20 [2022-01-18 15:14:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:42,071 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1303 transitions. [2022-01-18 15:14:42,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1303 transitions. [2022-01-18 15:14:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:42,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:42,072 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:42,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 15:14:42,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 15:14:42,287 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:42,288 INFO L85 PathProgramCache]: Analyzing trace with hash 659656260, now seen corresponding path program 51 times [2022-01-18 15:14:42,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:42,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974509038] [2022-01-18 15:14:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:42,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:42,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:42,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974509038] [2022-01-18 15:14:42,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974509038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:42,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454709747] [2022-01-18 15:14:42,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:42,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:42,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:42,411 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:42,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 15:14:42,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:14:42,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:42,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:14:42,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:42,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 51 [2022-01-18 15:14:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:42,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:43,186 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:43,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 95 [2022-01-18 15:14:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:43,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454709747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:43,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:43,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:14:43,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009178267] [2022-01-18 15:14:43,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:43,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:14:43,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:43,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:14:43,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:14:43,246 INFO L87 Difference]: Start difference. First operand 410 states and 1303 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:43,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:43,889 INFO L93 Difference]: Finished difference Result 662 states and 1977 transitions. [2022-01-18 15:14:43,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:14:43,890 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:43,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:43,891 INFO L225 Difference]: With dead ends: 662 [2022-01-18 15:14:43,891 INFO L226 Difference]: Without dead ends: 641 [2022-01-18 15:14:43,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:14:43,891 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 200 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:43,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 197 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-01-18 15:14:43,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 407. [2022-01-18 15:14:43,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.1724137931034484) internal successors, (1288), 406 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1288 transitions. [2022-01-18 15:14:43,897 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1288 transitions. Word has length 20 [2022-01-18 15:14:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:43,897 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1288 transitions. [2022-01-18 15:14:43,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1288 transitions. [2022-01-18 15:14:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:43,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:43,898 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:43,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:44,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:44,107 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:44,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1640109392, now seen corresponding path program 52 times [2022-01-18 15:14:44,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:44,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38296722] [2022-01-18 15:14:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:44,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:44,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:44,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38296722] [2022-01-18 15:14:44,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38296722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:44,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550447692] [2022-01-18 15:14:44,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:44,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:44,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:44,223 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:44,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 15:14:44,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:44,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:44,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:44,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-01-18 15:14:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:44,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:44,705 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:44,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:44,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550447692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:44,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:44,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:14:44,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505618960] [2022-01-18 15:14:44,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:44,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:44,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:44,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:44,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:44,730 INFO L87 Difference]: Start difference. First operand 407 states and 1288 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:45,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:45,583 INFO L93 Difference]: Finished difference Result 684 states and 2017 transitions. [2022-01-18 15:14:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:14:45,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:45,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:45,584 INFO L225 Difference]: With dead ends: 684 [2022-01-18 15:14:45,584 INFO L226 Difference]: Without dead ends: 678 [2022-01-18 15:14:45,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:14:45,584 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 183 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:45,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 294 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:45,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-18 15:14:45,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 411. [2022-01-18 15:14:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.175609756097561) internal successors, (1302), 410 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:45,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1302 transitions. [2022-01-18 15:14:45,590 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1302 transitions. Word has length 20 [2022-01-18 15:14:45,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:45,591 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1302 transitions. [2022-01-18 15:14:45,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:45,591 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1302 transitions. [2022-01-18 15:14:45,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:45,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:45,591 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:45,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:45,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-18 15:14:45,806 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:45,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1664009306, now seen corresponding path program 53 times [2022-01-18 15:14:45,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:45,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819516708] [2022-01-18 15:14:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:45,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:45,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:45,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819516708] [2022-01-18 15:14:45,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819516708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:45,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905219942] [2022-01-18 15:14:45,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:45,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:45,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:45,931 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:45,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 15:14:45,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:14:45,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:45,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:45,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:46,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-01-18 15:14:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:46,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:46,418 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:46,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:46,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905219942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:46,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:46,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:46,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178547519] [2022-01-18 15:14:46,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:46,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:46,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:46,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:46,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:46,438 INFO L87 Difference]: Start difference. First operand 411 states and 1302 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:47,047 INFO L93 Difference]: Finished difference Result 655 states and 1963 transitions. [2022-01-18 15:14:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:14:47,048 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:47,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:47,049 INFO L225 Difference]: With dead ends: 655 [2022-01-18 15:14:47,049 INFO L226 Difference]: Without dead ends: 655 [2022-01-18 15:14:47,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:14:47,049 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:47,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 220 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-18 15:14:47,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 406. [2022-01-18 15:14:47,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.167901234567901) internal successors, (1283), 405 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1283 transitions. [2022-01-18 15:14:47,055 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1283 transitions. Word has length 20 [2022-01-18 15:14:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:47,055 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1283 transitions. [2022-01-18 15:14:47,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1283 transitions. [2022-01-18 15:14:47,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:47,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:47,056 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:47,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 15:14:47,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 15:14:47,257 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:47,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:47,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1213216572, now seen corresponding path program 54 times [2022-01-18 15:14:47,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:47,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869892656] [2022-01-18 15:14:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:47,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:47,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:47,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869892656] [2022-01-18 15:14:47,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869892656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:47,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464006512] [2022-01-18 15:14:47,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:47,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:47,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:47,338 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:47,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 15:14:47,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:14:47,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:47,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:47,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:47,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:47,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:47,763 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:47,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:47,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464006512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:47,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:47,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:14:47,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017405108] [2022-01-18 15:14:47,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:47,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:14:47,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:47,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:14:47,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:14:47,783 INFO L87 Difference]: Start difference. First operand 406 states and 1283 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:48,093 INFO L93 Difference]: Finished difference Result 587 states and 1780 transitions. [2022-01-18 15:14:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:48,093 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:48,094 INFO L225 Difference]: With dead ends: 587 [2022-01-18 15:14:48,094 INFO L226 Difference]: Without dead ends: 575 [2022-01-18 15:14:48,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:48,095 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 90 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:48,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 127 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:14:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-01-18 15:14:48,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 408. [2022-01-18 15:14:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.1646191646191646) internal successors, (1288), 407 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1288 transitions. [2022-01-18 15:14:48,100 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1288 transitions. Word has length 20 [2022-01-18 15:14:48,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:48,100 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1288 transitions. [2022-01-18 15:14:48,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1288 transitions. [2022-01-18 15:14:48,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:48,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:48,101 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:48,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 15:14:48,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:48,312 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:48,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:48,312 INFO L85 PathProgramCache]: Analyzing trace with hash -472319238, now seen corresponding path program 55 times [2022-01-18 15:14:48,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:48,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118654720] [2022-01-18 15:14:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:48,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:48,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:48,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118654720] [2022-01-18 15:14:48,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118654720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:48,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505672915] [2022-01-18 15:14:48,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:48,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:48,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:48,414 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:48,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 15:14:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:48,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:48,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:48,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:14:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:48,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:48,862 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:48,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:48,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505672915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:48,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:48,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:14:48,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733960344] [2022-01-18 15:14:48,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:48,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:14:48,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:48,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:14:48,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:14:48,882 INFO L87 Difference]: Start difference. First operand 408 states and 1288 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:49,302 INFO L93 Difference]: Finished difference Result 612 states and 1832 transitions. [2022-01-18 15:14:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:14:49,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:49,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:49,303 INFO L225 Difference]: With dead ends: 612 [2022-01-18 15:14:49,303 INFO L226 Difference]: Without dead ends: 606 [2022-01-18 15:14:49,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:14:49,304 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:49,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 173 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-01-18 15:14:49,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 412. [2022-01-18 15:14:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.167883211678832) internal successors, (1302), 411 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1302 transitions. [2022-01-18 15:14:49,309 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1302 transitions. Word has length 20 [2022-01-18 15:14:49,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:49,309 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1302 transitions. [2022-01-18 15:14:49,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1302 transitions. [2022-01-18 15:14:49,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:49,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:49,310 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:49,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 15:14:49,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:49,510 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:49,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:49,511 INFO L85 PathProgramCache]: Analyzing trace with hash -448419324, now seen corresponding path program 56 times [2022-01-18 15:14:49,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:49,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875904349] [2022-01-18 15:14:49,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:49,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:49,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:49,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875904349] [2022-01-18 15:14:49,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875904349] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:49,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753472609] [2022-01-18 15:14:49,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:49,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:49,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:49,643 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:49,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 15:14:49,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:49,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:49,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:49,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:14:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:50,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:50,156 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:50,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:50,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753472609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:50,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:50,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:50,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593224599] [2022-01-18 15:14:50,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:50,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:50,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:50,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:50,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:50,175 INFO L87 Difference]: Start difference. First operand 412 states and 1302 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:50,641 INFO L93 Difference]: Finished difference Result 583 states and 1778 transitions. [2022-01-18 15:14:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:50,643 INFO L225 Difference]: With dead ends: 583 [2022-01-18 15:14:50,643 INFO L226 Difference]: Without dead ends: 583 [2022-01-18 15:14:50,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:50,643 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 105 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:50,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 152 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-18 15:14:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 408. [2022-01-18 15:14:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.1646191646191646) internal successors, (1288), 407 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1288 transitions. [2022-01-18 15:14:50,652 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1288 transitions. Word has length 20 [2022-01-18 15:14:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:50,652 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1288 transitions. [2022-01-18 15:14:50,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:50,652 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1288 transitions. [2022-01-18 15:14:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:50,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:50,653 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:50,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:50,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:50,869 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:50,869 INFO L85 PathProgramCache]: Analyzing trace with hash -852464528, now seen corresponding path program 57 times [2022-01-18 15:14:50,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:50,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579059565] [2022-01-18 15:14:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:50,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:50,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:50,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579059565] [2022-01-18 15:14:50,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579059565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:50,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466003407] [2022-01-18 15:14:50,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:50,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:50,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:50,962 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:50,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 15:14:51,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:14:51,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:51,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:51,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:51,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:14:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:51,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:51,496 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:51,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:51,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466003407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:51,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:51,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:51,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421636443] [2022-01-18 15:14:51,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:51,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:51,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:51,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:51,515 INFO L87 Difference]: Start difference. First operand 408 states and 1288 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:52,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:52,302 INFO L93 Difference]: Finished difference Result 780 states and 2322 transitions. [2022-01-18 15:14:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:52,303 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:52,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:52,304 INFO L225 Difference]: With dead ends: 780 [2022-01-18 15:14:52,304 INFO L226 Difference]: Without dead ends: 780 [2022-01-18 15:14:52,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:52,304 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 179 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:52,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 219 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:52,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-01-18 15:14:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 418. [2022-01-18 15:14:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.179856115107914) internal successors, (1326), 417 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1326 transitions. [2022-01-18 15:14:52,311 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1326 transitions. Word has length 20 [2022-01-18 15:14:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:52,311 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1326 transitions. [2022-01-18 15:14:52,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1326 transitions. [2022-01-18 15:14:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:52,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:52,312 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:52,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:52,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 15:14:52,528 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:52,528 INFO L85 PathProgramCache]: Analyzing trace with hash 29612906, now seen corresponding path program 58 times [2022-01-18 15:14:52,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:52,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308700639] [2022-01-18 15:14:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:52,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:52,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:52,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308700639] [2022-01-18 15:14:52,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308700639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:52,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375719150] [2022-01-18 15:14:52,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:52,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:52,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:52,630 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:52,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 15:14:52,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:52,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:52,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:52,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:52,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:14:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:52,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:53,105 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:53,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:53,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375719150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:53,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:53,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:14:53,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210484978] [2022-01-18 15:14:53,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:53,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:14:53,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:53,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:14:53,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:14:53,128 INFO L87 Difference]: Start difference. First operand 418 states and 1326 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:53,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:53,814 INFO L93 Difference]: Finished difference Result 786 states and 2329 transitions. [2022-01-18 15:14:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:14:53,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:53,816 INFO L225 Difference]: With dead ends: 786 [2022-01-18 15:14:53,816 INFO L226 Difference]: Without dead ends: 780 [2022-01-18 15:14:53,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:14:53,816 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 178 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:53,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 167 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:53,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-01-18 15:14:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 415. [2022-01-18 15:14:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.176328502415459) internal successors, (1315), 414 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1315 transitions. [2022-01-18 15:14:53,823 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1315 transitions. Word has length 20 [2022-01-18 15:14:53,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:53,823 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1315 transitions. [2022-01-18 15:14:53,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1315 transitions. [2022-01-18 15:14:53,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:53,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:53,824 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:53,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 15:14:54,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 15:14:54,024 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:54,024 INFO L85 PathProgramCache]: Analyzing trace with hash -505616896, now seen corresponding path program 59 times [2022-01-18 15:14:54,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:54,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244510989] [2022-01-18 15:14:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:54,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:54,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244510989] [2022-01-18 15:14:54,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244510989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054387409] [2022-01-18 15:14:54,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:54,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:54,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:54,099 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:54,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 15:14:54,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:54,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:54,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:54,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:54,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:54,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:54,537 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:54,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:54,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054387409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:54,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:54,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:14:54,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037403637] [2022-01-18 15:14:54,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:54,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:14:54,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:14:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:14:54,556 INFO L87 Difference]: Start difference. First operand 415 states and 1315 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:55,091 INFO L93 Difference]: Finished difference Result 750 states and 2247 transitions. [2022-01-18 15:14:55,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:55,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:55,092 INFO L225 Difference]: With dead ends: 750 [2022-01-18 15:14:55,092 INFO L226 Difference]: Without dead ends: 738 [2022-01-18 15:14:55,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:14:55,093 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 126 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:55,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 150 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:14:55,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-01-18 15:14:55,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 412. [2022-01-18 15:14:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.172749391727494) internal successors, (1304), 411 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1304 transitions. [2022-01-18 15:14:55,099 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1304 transitions. Word has length 20 [2022-01-18 15:14:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:55,099 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1304 transitions. [2022-01-18 15:14:55,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:55,099 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1304 transitions. [2022-01-18 15:14:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:55,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:55,100 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:55,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:55,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:55,300 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1518309428, now seen corresponding path program 60 times [2022-01-18 15:14:55,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:55,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595015193] [2022-01-18 15:14:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:55,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:55,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:55,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595015193] [2022-01-18 15:14:55,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595015193] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:55,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617728389] [2022-01-18 15:14:55,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:55,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:55,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:55,407 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:55,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 15:14:55,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:14:55,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:55,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:55,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:55,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:14:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:55,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:55,862 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:55,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:55,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617728389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:55,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:55,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:14:55,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387033726] [2022-01-18 15:14:55,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:55,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:55,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:55,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:55,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:55,880 INFO L87 Difference]: Start difference. First operand 412 states and 1304 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:56,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:56,559 INFO L93 Difference]: Finished difference Result 782 states and 2307 transitions. [2022-01-18 15:14:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:56,559 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:56,560 INFO L225 Difference]: With dead ends: 782 [2022-01-18 15:14:56,560 INFO L226 Difference]: Without dead ends: 764 [2022-01-18 15:14:56,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:14:56,561 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:56,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 166 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-01-18 15:14:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 409. [2022-01-18 15:14:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.1691176470588234) internal successors, (1293), 408 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1293 transitions. [2022-01-18 15:14:56,567 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1293 transitions. Word has length 20 [2022-01-18 15:14:56,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:56,567 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1293 transitions. [2022-01-18 15:14:56,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:56,567 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1293 transitions. [2022-01-18 15:14:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:56,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:56,568 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:56,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:56,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:56,771 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:56,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:56,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1188876872, now seen corresponding path program 61 times [2022-01-18 15:14:56,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:56,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319795512] [2022-01-18 15:14:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:56,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:56,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:56,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319795512] [2022-01-18 15:14:56,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319795512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:56,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506090102] [2022-01-18 15:14:56,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:56,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:56,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:56,893 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:56,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 15:14:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:56,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:56,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:57,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:14:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:57,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:57,479 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:57,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:57,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506090102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:57,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:57,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:14:57,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341558977] [2022-01-18 15:14:57,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:57,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:57,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:57,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:57,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:57,504 INFO L87 Difference]: Start difference. First operand 409 states and 1293 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:58,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:58,206 INFO L93 Difference]: Finished difference Result 719 states and 2161 transitions. [2022-01-18 15:14:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:58,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:58,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:58,207 INFO L225 Difference]: With dead ends: 719 [2022-01-18 15:14:58,207 INFO L226 Difference]: Without dead ends: 719 [2022-01-18 15:14:58,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:58,207 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 165 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:58,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 198 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-18 15:14:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 416. [2022-01-18 15:14:58,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.180722891566265) internal successors, (1320), 415 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1320 transitions. [2022-01-18 15:14:58,214 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1320 transitions. Word has length 20 [2022-01-18 15:14:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:58,214 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1320 transitions. [2022-01-18 15:14:58,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:58,214 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1320 transitions. [2022-01-18 15:14:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:58,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:58,214 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:58,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 15:14:58,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:58,430 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:58,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:58,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2070954306, now seen corresponding path program 62 times [2022-01-18 15:14:58,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:58,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049148953] [2022-01-18 15:14:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:58,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:58,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:58,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049148953] [2022-01-18 15:14:58,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049148953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:58,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462607078] [2022-01-18 15:14:58,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:58,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:58,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:58,527 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:58,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 15:14:58,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:58,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:58,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:58,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:58,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:14:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:58,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:59,057 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:59,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:14:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:59,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462607078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:59,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:59,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:14:59,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626961564] [2022-01-18 15:14:59,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:59,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:14:59,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:59,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:14:59,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:14:59,076 INFO L87 Difference]: Start difference. First operand 416 states and 1320 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:59,706 INFO L93 Difference]: Finished difference Result 725 states and 2168 transitions. [2022-01-18 15:14:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:14:59,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:14:59,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:59,707 INFO L225 Difference]: With dead ends: 725 [2022-01-18 15:14:59,707 INFO L226 Difference]: Without dead ends: 719 [2022-01-18 15:14:59,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:14:59,707 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 149 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:59,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 174 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-18 15:14:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 413. [2022-01-18 15:14:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1771844660194173) internal successors, (1309), 412 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1309 transitions. [2022-01-18 15:14:59,713 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1309 transitions. Word has length 20 [2022-01-18 15:14:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:59,713 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1309 transitions. [2022-01-18 15:14:59,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1309 transitions. [2022-01-18 15:14:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:14:59,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:59,714 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:59,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 15:14:59,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:59,915 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:59,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1535724504, now seen corresponding path program 63 times [2022-01-18 15:14:59,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:59,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203602923] [2022-01-18 15:14:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:59,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:59,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:59,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203602923] [2022-01-18 15:14:59,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203602923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:59,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071177340] [2022-01-18 15:14:59,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:59,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:59,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:59,995 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:59,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 15:15:00,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:15:00,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:00,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:00,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:00,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:00,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:00,508 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:00,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:00,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071177340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:00,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:00,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:15:00,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143901193] [2022-01-18 15:15:00,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:00,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:15:00,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:00,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:15:00,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:15:00,527 INFO L87 Difference]: Start difference. First operand 413 states and 1309 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:00,986 INFO L93 Difference]: Finished difference Result 689 states and 2086 transitions. [2022-01-18 15:15:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:00,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:00,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:00,987 INFO L225 Difference]: With dead ends: 689 [2022-01-18 15:15:00,987 INFO L226 Difference]: Without dead ends: 677 [2022-01-18 15:15:00,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:00,988 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:00,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 105 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:15:00,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-18 15:15:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 410. [2022-01-18 15:15:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.17359413202934) internal successors, (1298), 409 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1298 transitions. [2022-01-18 15:15:00,993 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1298 transitions. Word has length 20 [2022-01-18 15:15:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:00,993 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1298 transitions. [2022-01-18 15:15:00,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1298 transitions. [2022-01-18 15:15:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:00,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:00,994 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:01,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:01,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 15:15:01,195 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1613109550, now seen corresponding path program 64 times [2022-01-18 15:15:01,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:01,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640316772] [2022-01-18 15:15:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:01,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:01,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:01,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640316772] [2022-01-18 15:15:01,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640316772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:01,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288762857] [2022-01-18 15:15:01,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:01,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:01,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:01,332 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:01,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 15:15:01,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:01,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:01,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:01,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:01,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:15:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:01,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:01,884 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:01,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:01,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288762857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:01,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:01,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:15:01,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745872072] [2022-01-18 15:15:01,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:01,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:01,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:01,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:01,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:01,903 INFO L87 Difference]: Start difference. First operand 410 states and 1298 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:02,836 INFO L93 Difference]: Finished difference Result 794 states and 2346 transitions. [2022-01-18 15:15:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:02,836 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:02,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:02,837 INFO L225 Difference]: With dead ends: 794 [2022-01-18 15:15:02,837 INFO L226 Difference]: Without dead ends: 794 [2022-01-18 15:15:02,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:15:02,838 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 305 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:02,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 208 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-01-18 15:15:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 418. [2022-01-18 15:15:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.199040767386091) internal successors, (1334), 417 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1334 transitions. [2022-01-18 15:15:02,844 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1334 transitions. Word has length 20 [2022-01-18 15:15:02,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:02,844 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1334 transitions. [2022-01-18 15:15:02,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1334 transitions. [2022-01-18 15:15:02,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:02,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:02,845 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:02,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 15:15:03,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:03,059 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:03,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:03,059 INFO L85 PathProgramCache]: Analyzing trace with hash -731032116, now seen corresponding path program 65 times [2022-01-18 15:15:03,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:03,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090355700] [2022-01-18 15:15:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:03,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:03,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:03,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090355700] [2022-01-18 15:15:03,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090355700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:03,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739486519] [2022-01-18 15:15:03,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:03,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:03,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:03,177 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:03,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 15:15:03,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:03,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:03,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:03,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:03,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:15:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:03,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:03,698 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:03,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:03,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739486519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:03,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:03,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:03,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302272324] [2022-01-18 15:15:03,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:03,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:03,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:03,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:03,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:03,718 INFO L87 Difference]: Start difference. First operand 418 states and 1334 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:04,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:04,778 INFO L93 Difference]: Finished difference Result 800 states and 2347 transitions. [2022-01-18 15:15:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:15:04,779 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:04,780 INFO L225 Difference]: With dead ends: 800 [2022-01-18 15:15:04,780 INFO L226 Difference]: Without dead ends: 794 [2022-01-18 15:15:04,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:15:04,780 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 224 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:04,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 259 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-01-18 15:15:04,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 415. [2022-01-18 15:15:04,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.1956521739130435) internal successors, (1323), 414 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:04,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1323 transitions. [2022-01-18 15:15:04,787 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1323 transitions. Word has length 20 [2022-01-18 15:15:04,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:04,787 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1323 transitions. [2022-01-18 15:15:04,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:04,787 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1323 transitions. [2022-01-18 15:15:04,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:04,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:04,788 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:04,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 15:15:04,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 15:15:04,988 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:04,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:04,988 INFO L85 PathProgramCache]: Analyzing trace with hash -872212216, now seen corresponding path program 66 times [2022-01-18 15:15:04,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:04,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984338671] [2022-01-18 15:15:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:04,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:05,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:05,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984338671] [2022-01-18 15:15:05,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984338671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:05,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195313903] [2022-01-18 15:15:05,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:05,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:05,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:05,108 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:05,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 15:15:05,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:15:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:05,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:05,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:15:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:05,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:05,683 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:05,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:05,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195313903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:05,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:05,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:15:05,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948202798] [2022-01-18 15:15:05,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:05,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:05,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:05,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:05,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:05,702 INFO L87 Difference]: Start difference. First operand 415 states and 1323 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:06,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:06,366 INFO L93 Difference]: Finished difference Result 762 states and 2267 transitions. [2022-01-18 15:15:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:06,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:06,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:06,367 INFO L225 Difference]: With dead ends: 762 [2022-01-18 15:15:06,367 INFO L226 Difference]: Without dead ends: 762 [2022-01-18 15:15:06,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:15:06,367 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 223 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:06,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 171 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-18 15:15:06,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 414. [2022-01-18 15:15:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.1912832929782082) internal successors, (1318), 413 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1318 transitions. [2022-01-18 15:15:06,374 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1318 transitions. Word has length 20 [2022-01-18 15:15:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:06,374 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1318 transitions. [2022-01-18 15:15:06,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1318 transitions. [2022-01-18 15:15:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:06,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:06,375 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:06,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-18 15:15:06,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 15:15:06,576 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:06,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:06,576 INFO L85 PathProgramCache]: Analyzing trace with hash 122163404, now seen corresponding path program 67 times [2022-01-18 15:15:06,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:06,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727191136] [2022-01-18 15:15:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:06,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:06,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:06,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727191136] [2022-01-18 15:15:06,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727191136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:06,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859070934] [2022-01-18 15:15:06,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:06,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:06,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:06,727 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:06,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 15:15:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:06,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:06,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:06,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:15:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:07,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:07,258 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:07,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:07,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859070934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:07,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:07,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:15:07,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506162738] [2022-01-18 15:15:07,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:07,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:07,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:07,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:07,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:07,276 INFO L87 Difference]: Start difference. First operand 414 states and 1318 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:07,900 INFO L93 Difference]: Finished difference Result 725 states and 2185 transitions. [2022-01-18 15:15:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:07,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:07,901 INFO L225 Difference]: With dead ends: 725 [2022-01-18 15:15:07,901 INFO L226 Difference]: Without dead ends: 725 [2022-01-18 15:15:07,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:15:07,902 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 184 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:07,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 169 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-18 15:15:07,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 411. [2022-01-18 15:15:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.178048780487805) internal successors, (1303), 410 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1303 transitions. [2022-01-18 15:15:07,908 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1303 transitions. Word has length 20 [2022-01-18 15:15:07,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:07,908 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1303 transitions. [2022-01-18 15:15:07,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1303 transitions. [2022-01-18 15:15:07,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:07,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:07,908 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:07,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 15:15:08,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 15:15:08,109 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1102616536, now seen corresponding path program 68 times [2022-01-18 15:15:08,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:08,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655595456] [2022-01-18 15:15:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:08,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:08,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:08,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655595456] [2022-01-18 15:15:08,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655595456] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:08,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986020372] [2022-01-18 15:15:08,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:08,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:08,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:08,235 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:08,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 15:15:08,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:08,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:08,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:08,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:08,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:15:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:08,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:08,741 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:08,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:08,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986020372] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:08,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:08,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:08,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27607707] [2022-01-18 15:15:08,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:08,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:08,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:08,760 INFO L87 Difference]: Start difference. First operand 411 states and 1303 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:09,774 INFO L93 Difference]: Finished difference Result 762 states and 2259 transitions. [2022-01-18 15:15:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:15:09,774 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:09,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:09,775 INFO L225 Difference]: With dead ends: 762 [2022-01-18 15:15:09,775 INFO L226 Difference]: Without dead ends: 756 [2022-01-18 15:15:09,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:15:09,775 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 216 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:09,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 234 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-01-18 15:15:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 415. [2022-01-18 15:15:09,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.181159420289855) internal successors, (1317), 414 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1317 transitions. [2022-01-18 15:15:09,782 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1317 transitions. Word has length 20 [2022-01-18 15:15:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:09,782 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1317 transitions. [2022-01-18 15:15:09,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1317 transitions. [2022-01-18 15:15:09,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:09,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:09,783 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:09,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 15:15:09,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 15:15:09,983 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:09,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:09,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1126516450, now seen corresponding path program 69 times [2022-01-18 15:15:09,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:09,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976324323] [2022-01-18 15:15:09,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:09,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:10,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:10,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976324323] [2022-01-18 15:15:10,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976324323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:10,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032768852] [2022-01-18 15:15:10,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:10,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:10,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:10,111 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:10,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 15:15:10,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:15:10,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:10,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:10,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:10,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-01-18 15:15:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:10,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:10,724 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:10,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:10,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032768852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:10,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:10,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:15:10,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536177900] [2022-01-18 15:15:10,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:10,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:10,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:10,748 INFO L87 Difference]: Start difference. First operand 415 states and 1317 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:11,626 INFO L93 Difference]: Finished difference Result 739 states and 2220 transitions. [2022-01-18 15:15:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:11,627 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:11,628 INFO L225 Difference]: With dead ends: 739 [2022-01-18 15:15:11,628 INFO L226 Difference]: Without dead ends: 739 [2022-01-18 15:15:11,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:15:11,628 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 181 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:11,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 194 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-01-18 15:15:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 410. [2022-01-18 15:15:11,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.17359413202934) internal successors, (1298), 409 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1298 transitions. [2022-01-18 15:15:11,634 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1298 transitions. Word has length 20 [2022-01-18 15:15:11,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:11,634 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1298 transitions. [2022-01-18 15:15:11,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:11,634 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1298 transitions. [2022-01-18 15:15:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:11,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:11,635 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:11,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 15:15:11,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:11,835 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:11,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1750709428, now seen corresponding path program 70 times [2022-01-18 15:15:11,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:11,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276337978] [2022-01-18 15:15:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:11,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:11,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:11,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276337978] [2022-01-18 15:15:11,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276337978] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:11,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064699668] [2022-01-18 15:15:11,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:11,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:11,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:11,981 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:11,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 15:15:12,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:12,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:12,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:12,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:12,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:12,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:12,487 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:12,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:12,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064699668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:12,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:12,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:12,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081325895] [2022-01-18 15:15:12,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:12,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:12,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:12,513 INFO L87 Difference]: Start difference. First operand 410 states and 1298 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:13,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:13,148 INFO L93 Difference]: Finished difference Result 681 states and 2064 transitions. [2022-01-18 15:15:13,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:13,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:13,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:13,150 INFO L225 Difference]: With dead ends: 681 [2022-01-18 15:15:13,150 INFO L226 Difference]: Without dead ends: 669 [2022-01-18 15:15:13,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:15:13,150 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 129 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:13,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 200 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:13,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-18 15:15:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 412. [2022-01-18 15:15:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.170316301703163) internal successors, (1303), 411 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1303 transitions. [2022-01-18 15:15:13,156 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1303 transitions. Word has length 20 [2022-01-18 15:15:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:13,156 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1303 transitions. [2022-01-18 15:15:13,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1303 transitions. [2022-01-18 15:15:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:13,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:13,157 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:13,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 15:15:13,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:13,357 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:13,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1009812094, now seen corresponding path program 71 times [2022-01-18 15:15:13,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:13,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135357916] [2022-01-18 15:15:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:13,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:13,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135357916] [2022-01-18 15:15:13,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135357916] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707573217] [2022-01-18 15:15:13,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:13,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:13,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:13,467 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:13,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 15:15:13,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:13,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:13,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:13,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:13,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:15:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:13,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:13,984 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:13,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:14,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707573217] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:14,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:14,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:15:14,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919912384] [2022-01-18 15:15:14,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:14,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:15:14,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:15:14,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:15:14,006 INFO L87 Difference]: Start difference. First operand 412 states and 1303 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:14,614 INFO L93 Difference]: Finished difference Result 706 states and 2116 transitions. [2022-01-18 15:15:14,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:14,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:14,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:14,616 INFO L225 Difference]: With dead ends: 706 [2022-01-18 15:15:14,616 INFO L226 Difference]: Without dead ends: 700 [2022-01-18 15:15:14,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:15:14,616 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 185 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:14,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 149 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:14,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-01-18 15:15:14,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 416. [2022-01-18 15:15:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.1734939759036145) internal successors, (1317), 415 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:14,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1317 transitions. [2022-01-18 15:15:14,622 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1317 transitions. Word has length 20 [2022-01-18 15:15:14,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:14,622 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1317 transitions. [2022-01-18 15:15:14,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1317 transitions. [2022-01-18 15:15:14,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:14,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:14,623 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:14,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 15:15:14,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:14,823 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:14,824 INFO L85 PathProgramCache]: Analyzing trace with hash -985912180, now seen corresponding path program 72 times [2022-01-18 15:15:14,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:14,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696842216] [2022-01-18 15:15:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:14,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:14,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:14,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696842216] [2022-01-18 15:15:14,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696842216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:14,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895453942] [2022-01-18 15:15:14,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:14,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:14,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:14,902 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:14,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 15:15:14,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:15:14,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:14,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:14,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:15,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:15:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:15,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:15,397 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:15,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:15,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895453942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:15,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:15,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:15:15,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460071190] [2022-01-18 15:15:15,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:15,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:15,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:15,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:15,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:15,417 INFO L87 Difference]: Start difference. First operand 416 states and 1317 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:15,853 INFO L93 Difference]: Finished difference Result 677 states and 2062 transitions. [2022-01-18 15:15:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:15,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:15,854 INFO L225 Difference]: With dead ends: 677 [2022-01-18 15:15:15,854 INFO L226 Difference]: Without dead ends: 677 [2022-01-18 15:15:15,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:15,855 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:15,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 120 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:15:15,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-18 15:15:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 409. [2022-01-18 15:15:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.1691176470588234) internal successors, (1293), 408 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1293 transitions. [2022-01-18 15:15:15,860 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1293 transitions. Word has length 20 [2022-01-18 15:15:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:15,860 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1293 transitions. [2022-01-18 15:15:15,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:15,861 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1293 transitions. [2022-01-18 15:15:15,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:15,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:15,861 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:15,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 15:15:16,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-01-18 15:15:16,075 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:16,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:16,075 INFO L85 PathProgramCache]: Analyzing trace with hash -318546216, now seen corresponding path program 73 times [2022-01-18 15:15:16,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:16,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709894897] [2022-01-18 15:15:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:16,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:16,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:16,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709894897] [2022-01-18 15:15:16,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709894897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:16,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501125178] [2022-01-18 15:15:16,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:16,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:16,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:16,156 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:16,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 15:15:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:16,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:16,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:16,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:16,524 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:16,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:16,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501125178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:16,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:16,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:15:16,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864634498] [2022-01-18 15:15:16,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:16,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:15:16,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:16,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:15:16,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:15:16,544 INFO L87 Difference]: Start difference. First operand 409 states and 1293 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:16,910 INFO L93 Difference]: Finished difference Result 704 states and 2102 transitions. [2022-01-18 15:15:16,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:16,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:16,912 INFO L225 Difference]: With dead ends: 704 [2022-01-18 15:15:16,912 INFO L226 Difference]: Without dead ends: 686 [2022-01-18 15:15:16,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:16,912 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 117 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:16,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 142 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:15:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-18 15:15:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 411. [2022-01-18 15:15:16,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.1658536585365855) internal successors, (1298), 410 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:16,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1298 transitions. [2022-01-18 15:15:16,918 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1298 transitions. Word has length 20 [2022-01-18 15:15:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:16,918 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1298 transitions. [2022-01-18 15:15:16,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1298 transitions. [2022-01-18 15:15:16,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:16,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:16,919 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:16,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:17,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:17,119 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:17,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:17,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1271324160, now seen corresponding path program 74 times [2022-01-18 15:15:17,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:17,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239978984] [2022-01-18 15:15:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:17,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:17,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:17,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239978984] [2022-01-18 15:15:17,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239978984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:17,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294530157] [2022-01-18 15:15:17,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:17,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:17,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:17,195 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:17,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 15:15:17,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:17,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:17,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:17,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:17,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:17,614 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:17,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:17,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294530157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:17,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:17,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:15:17,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975930903] [2022-01-18 15:15:17,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:17,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:15:17,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:17,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:15:17,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:15:17,633 INFO L87 Difference]: Start difference. First operand 411 states and 1298 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:18,053 INFO L93 Difference]: Finished difference Result 663 states and 2016 transitions. [2022-01-18 15:15:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:18,054 INFO L225 Difference]: With dead ends: 663 [2022-01-18 15:15:18,054 INFO L226 Difference]: Without dead ends: 651 [2022-01-18 15:15:18,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:18,055 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 100 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:18,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 143 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:15:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-01-18 15:15:18,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 413. [2022-01-18 15:15:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.162621359223301) internal successors, (1303), 412 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1303 transitions. [2022-01-18 15:15:18,060 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1303 transitions. Word has length 20 [2022-01-18 15:15:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:18,060 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1303 transitions. [2022-01-18 15:15:18,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1303 transitions. [2022-01-18 15:15:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:18,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:18,061 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:18,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 15:15:18,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:18,261 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:18,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2012221494, now seen corresponding path program 75 times [2022-01-18 15:15:18,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:18,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358522769] [2022-01-18 15:15:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:18,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:18,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:18,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358522769] [2022-01-18 15:15:18,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358522769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:18,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570925804] [2022-01-18 15:15:18,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:18,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:18,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:18,360 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:18,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 15:15:18,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:15:18,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:18,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:18,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:18,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:15:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:18,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:18,825 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:18,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:18,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570925804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:18,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:18,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:18,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817795993] [2022-01-18 15:15:18,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:18,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:18,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:18,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:18,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:18,848 INFO L87 Difference]: Start difference. First operand 413 states and 1303 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:19,596 INFO L93 Difference]: Finished difference Result 686 states and 2061 transitions. [2022-01-18 15:15:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:19,596 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:19,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:19,597 INFO L225 Difference]: With dead ends: 686 [2022-01-18 15:15:19,597 INFO L226 Difference]: Without dead ends: 680 [2022-01-18 15:15:19,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:15:19,597 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 191 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:19,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 180 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-01-18 15:15:19,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 417. [2022-01-18 15:15:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.1658653846153846) internal successors, (1317), 416 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1317 transitions. [2022-01-18 15:15:19,603 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1317 transitions. Word has length 20 [2022-01-18 15:15:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:19,603 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1317 transitions. [2022-01-18 15:15:19,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:19,603 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1317 transitions. [2022-01-18 15:15:19,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:19,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:19,604 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:19,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 15:15:19,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-18 15:15:19,804 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:19,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2036121408, now seen corresponding path program 76 times [2022-01-18 15:15:19,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:19,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995235882] [2022-01-18 15:15:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:19,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:19,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:19,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995235882] [2022-01-18 15:15:19,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995235882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:19,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796010336] [2022-01-18 15:15:19,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:19,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:19,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:19,881 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:19,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 15:15:19,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:19,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:19,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:19,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:20,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:15:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:20,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:20,345 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:15:20,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:15:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:20,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796010336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:20,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:20,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:15:20,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702753509] [2022-01-18 15:15:20,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:20,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:20,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:20,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:20,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:20,369 INFO L87 Difference]: Start difference. First operand 417 states and 1317 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:20,766 INFO L93 Difference]: Finished difference Result 657 states and 2007 transitions. [2022-01-18 15:15:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:20,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:20,768 INFO L225 Difference]: With dead ends: 657 [2022-01-18 15:15:20,768 INFO L226 Difference]: Without dead ends: 657 [2022-01-18 15:15:20,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:20,768 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 92 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:20,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 119 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:15:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-01-18 15:15:20,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 411. [2022-01-18 15:15:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.1658536585365855) internal successors, (1298), 410 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1298 transitions. [2022-01-18 15:15:20,774 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1298 transitions. Word has length 20 [2022-01-18 15:15:20,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:20,774 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1298 transitions. [2022-01-18 15:15:20,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1298 transitions. [2022-01-18 15:15:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:20,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:20,774 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:20,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:20,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 15:15:20,975 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:20,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1849651584, now seen corresponding path program 77 times [2022-01-18 15:15:20,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:20,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210395804] [2022-01-18 15:15:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:20,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:21,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210395804] [2022-01-18 15:15:21,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210395804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141988594] [2022-01-18 15:15:21,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:21,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:21,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:21,078 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:21,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 15:15:21,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:21,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:21,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:21,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:21,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:21,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:21,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:21,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141988594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:21,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:21,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:21,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363357837] [2022-01-18 15:15:21,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:21,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:21,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:21,439 INFO L87 Difference]: Start difference. First operand 411 states and 1298 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:21,757 INFO L93 Difference]: Finished difference Result 514 states and 1562 transitions. [2022-01-18 15:15:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:21,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:21,759 INFO L225 Difference]: With dead ends: 514 [2022-01-18 15:15:21,759 INFO L226 Difference]: Without dead ends: 514 [2022-01-18 15:15:21,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:21,759 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 86 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:21,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 221 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:21,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-18 15:15:21,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 421. [2022-01-18 15:15:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.1523809523809523) internal successors, (1324), 420 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1324 transitions. [2022-01-18 15:15:21,764 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1324 transitions. Word has length 20 [2022-01-18 15:15:21,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:21,764 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1324 transitions. [2022-01-18 15:15:21,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1324 transitions. [2022-01-18 15:15:21,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:21,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:21,765 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:21,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:21,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:21,965 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:21,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:21,966 INFO L85 PathProgramCache]: Analyzing trace with hash -420433722, now seen corresponding path program 78 times [2022-01-18 15:15:21,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:21,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423374739] [2022-01-18 15:15:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:21,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:22,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423374739] [2022-01-18 15:15:22,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423374739] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380874894] [2022-01-18 15:15:22,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:22,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:22,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:22,050 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:22,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 15:15:22,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:15:22,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:22,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:22,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:22,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:22,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:22,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:22,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:22,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380874894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:22,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:22,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:22,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34385427] [2022-01-18 15:15:22,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:22,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:22,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:22,459 INFO L87 Difference]: Start difference. First operand 421 states and 1324 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:22,733 INFO L93 Difference]: Finished difference Result 566 states and 1683 transitions. [2022-01-18 15:15:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:22,734 INFO L225 Difference]: With dead ends: 566 [2022-01-18 15:15:22,734 INFO L226 Difference]: Without dead ends: 566 [2022-01-18 15:15:22,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:15:22,734 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 88 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:22,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 197 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-18 15:15:22,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 424. [2022-01-18 15:15:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1560283687943262) internal successors, (1335), 423 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1335 transitions. [2022-01-18 15:15:22,740 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1335 transitions. Word has length 20 [2022-01-18 15:15:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:22,740 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1335 transitions. [2022-01-18 15:15:22,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1335 transitions. [2022-01-18 15:15:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:22,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:22,741 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:22,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 15:15:22,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:22,941 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash 461643712, now seen corresponding path program 79 times [2022-01-18 15:15:22,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:22,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933059281] [2022-01-18 15:15:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:22,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:23,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:23,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933059281] [2022-01-18 15:15:23,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933059281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:23,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763029943] [2022-01-18 15:15:23,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:23,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:23,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:23,019 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:23,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 15:15:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:23,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:23,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:23,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:23,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:23,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:23,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:23,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763029943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:23,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:23,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:15:23,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719413745] [2022-01-18 15:15:23,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:23,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:15:23,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:23,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:15:23,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:15:23,386 INFO L87 Difference]: Start difference. First operand 424 states and 1335 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:23,647 INFO L93 Difference]: Finished difference Result 523 states and 1580 transitions. [2022-01-18 15:15:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:23,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:23,648 INFO L225 Difference]: With dead ends: 523 [2022-01-18 15:15:23,648 INFO L226 Difference]: Without dead ends: 517 [2022-01-18 15:15:23,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:23,649 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:23,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 182 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-18 15:15:23,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 416. [2022-01-18 15:15:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.1590361445783133) internal successors, (1311), 415 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1311 transitions. [2022-01-18 15:15:23,654 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1311 transitions. Word has length 20 [2022-01-18 15:15:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:23,654 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1311 transitions. [2022-01-18 15:15:23,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1311 transitions. [2022-01-18 15:15:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:23,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:23,655 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:23,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-18 15:15:23,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:23,855 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:23,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash -926779988, now seen corresponding path program 80 times [2022-01-18 15:15:23,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:23,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631013598] [2022-01-18 15:15:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:23,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:23,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:23,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631013598] [2022-01-18 15:15:23,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631013598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:23,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994795816] [2022-01-18 15:15:23,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:23,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:23,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:23,938 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:23,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 15:15:24,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:24,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:24,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:24,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:24,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:15:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:24,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:24,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:24,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:24,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994795816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:24,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:24,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:24,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184675965] [2022-01-18 15:15:24,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:24,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:24,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:24,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:24,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:24,402 INFO L87 Difference]: Start difference. First operand 416 states and 1311 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:24,696 INFO L93 Difference]: Finished difference Result 492 states and 1496 transitions. [2022-01-18 15:15:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:24,696 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:24,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:24,697 INFO L225 Difference]: With dead ends: 492 [2022-01-18 15:15:24,697 INFO L226 Difference]: Without dead ends: 492 [2022-01-18 15:15:24,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:15:24,697 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:24,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 177 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:24,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-18 15:15:24,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 422. [2022-01-18 15:15:24,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.166270783847981) internal successors, (1333), 421 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1333 transitions. [2022-01-18 15:15:24,702 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1333 transitions. Word has length 20 [2022-01-18 15:15:24,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:24,702 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1333 transitions. [2022-01-18 15:15:24,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1333 transitions. [2022-01-18 15:15:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:24,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:24,703 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:24,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:24,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:24,904 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash -44702554, now seen corresponding path program 81 times [2022-01-18 15:15:24,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:24,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909163088] [2022-01-18 15:15:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:24,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:25,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:25,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909163088] [2022-01-18 15:15:25,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909163088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:25,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008961493] [2022-01-18 15:15:25,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:25,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:25,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:25,003 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:25,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 15:15:25,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:15:25,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:25,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:25,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:25,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:15:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:25,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:25,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:25,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:25,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008961493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:25,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:25,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:25,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756450277] [2022-01-18 15:15:25,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:25,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:25,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:25,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:25,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:25,433 INFO L87 Difference]: Start difference. First operand 422 states and 1333 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:25,831 INFO L93 Difference]: Finished difference Result 498 states and 1503 transitions. [2022-01-18 15:15:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:15:25,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:25,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:25,832 INFO L225 Difference]: With dead ends: 498 [2022-01-18 15:15:25,832 INFO L226 Difference]: Without dead ends: 492 [2022-01-18 15:15:25,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:25,832 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:25,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 221 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:25,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-18 15:15:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 419. [2022-01-18 15:15:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.1626794258373208) internal successors, (1322), 418 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1322 transitions. [2022-01-18 15:15:25,837 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1322 transitions. Word has length 20 [2022-01-18 15:15:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:25,838 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1322 transitions. [2022-01-18 15:15:25,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1322 transitions. [2022-01-18 15:15:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:25,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:25,838 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:25,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:26,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:26,039 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:26,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:26,039 INFO L85 PathProgramCache]: Analyzing trace with hash -579932356, now seen corresponding path program 82 times [2022-01-18 15:15:26,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:26,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276289209] [2022-01-18 15:15:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:26,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:26,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:26,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276289209] [2022-01-18 15:15:26,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276289209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:26,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416640115] [2022-01-18 15:15:26,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:26,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:26,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:26,117 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:26,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 15:15:26,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:26,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:26,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:26,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:26,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:26,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:26,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:26,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:26,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416640115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:26,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:26,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:26,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434426620] [2022-01-18 15:15:26,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:26,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:26,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:26,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:26,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:26,561 INFO L87 Difference]: Start difference. First operand 419 states and 1322 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:26,930 INFO L93 Difference]: Finished difference Result 456 states and 1408 transitions. [2022-01-18 15:15:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:26,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:26,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:26,931 INFO L225 Difference]: With dead ends: 456 [2022-01-18 15:15:26,931 INFO L226 Difference]: Without dead ends: 444 [2022-01-18 15:15:26,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:15:26,931 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:26,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 206 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:26,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-18 15:15:26,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 411. [2022-01-18 15:15:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.1658536585365855) internal successors, (1298), 410 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1298 transitions. [2022-01-18 15:15:26,936 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1298 transitions. Word has length 20 [2022-01-18 15:15:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:26,936 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1298 transitions. [2022-01-18 15:15:26,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:26,936 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1298 transitions. [2022-01-18 15:15:26,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:26,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:26,937 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:26,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:27,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-18 15:15:27,151 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1890872999, now seen corresponding path program 83 times [2022-01-18 15:15:27,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:27,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138012850] [2022-01-18 15:15:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:27,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:27,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:27,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138012850] [2022-01-18 15:15:27,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138012850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:27,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673011623] [2022-01-18 15:15:27,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:27,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:27,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:27,197 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:27,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 15:15:27,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:27,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:27,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:27,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:27,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:15:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:27,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:27,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:27,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:15:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:27,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673011623] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:27,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:27,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 15:15:27,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699679184] [2022-01-18 15:15:27,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:27,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:15:27,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:27,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:15:27,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:15:27,531 INFO L87 Difference]: Start difference. First operand 411 states and 1298 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:27,786 INFO L93 Difference]: Finished difference Result 553 states and 1706 transitions. [2022-01-18 15:15:27,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:27,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:27,787 INFO L225 Difference]: With dead ends: 553 [2022-01-18 15:15:27,787 INFO L226 Difference]: Without dead ends: 501 [2022-01-18 15:15:27,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:27,788 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:27,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 205 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:27,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-18 15:15:27,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 406. [2022-01-18 15:15:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.1555555555555554) internal successors, (1278), 405 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1278 transitions. [2022-01-18 15:15:27,793 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1278 transitions. Word has length 20 [2022-01-18 15:15:27,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:27,793 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1278 transitions. [2022-01-18 15:15:27,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1278 transitions. [2022-01-18 15:15:27,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:27,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:27,794 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:27,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 15:15:27,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:27,994 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:27,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:27,994 INFO L85 PathProgramCache]: Analyzing trace with hash 887418422, now seen corresponding path program 84 times [2022-01-18 15:15:27,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:27,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299083494] [2022-01-18 15:15:27,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:27,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:28,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:28,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299083494] [2022-01-18 15:15:28,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299083494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:28,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365283462] [2022-01-18 15:15:28,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:28,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:28,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:28,118 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:28,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 15:15:28,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:15:28,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:28,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:28,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:28,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:15:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:28,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:28,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:28,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:28,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365283462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:28,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:28,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:28,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683156221] [2022-01-18 15:15:28,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:28,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:28,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:28,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:28,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:28,523 INFO L87 Difference]: Start difference. First operand 406 states and 1278 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:28,827 INFO L93 Difference]: Finished difference Result 669 states and 1967 transitions. [2022-01-18 15:15:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:28,827 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:28,828 INFO L225 Difference]: With dead ends: 669 [2022-01-18 15:15:28,828 INFO L226 Difference]: Without dead ends: 669 [2022-01-18 15:15:28,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:15:28,828 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 108 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:28,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 226 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-18 15:15:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 416. [2022-01-18 15:15:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.1542168674698794) internal successors, (1309), 415 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1309 transitions. [2022-01-18 15:15:28,835 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1309 transitions. Word has length 20 [2022-01-18 15:15:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:28,835 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1309 transitions. [2022-01-18 15:15:28,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1309 transitions. [2022-01-18 15:15:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:28,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:28,836 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:28,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:29,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:29,037 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:29,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:29,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1382666884, now seen corresponding path program 85 times [2022-01-18 15:15:29,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:29,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567116686] [2022-01-18 15:15:29,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:29,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:29,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:29,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567116686] [2022-01-18 15:15:29,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567116686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:29,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981467942] [2022-01-18 15:15:29,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:29,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:29,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:29,146 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:29,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 15:15:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:29,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:29,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:29,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:15:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:29,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:29,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:29,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:29,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981467942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:29,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:29,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:29,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79127860] [2022-01-18 15:15:29,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:29,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:29,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:29,592 INFO L87 Difference]: Start difference. First operand 416 states and 1309 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:29,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:29,881 INFO L93 Difference]: Finished difference Result 712 states and 2061 transitions. [2022-01-18 15:15:29,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:29,881 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:29,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:29,882 INFO L225 Difference]: With dead ends: 712 [2022-01-18 15:15:29,882 INFO L226 Difference]: Without dead ends: 712 [2022-01-18 15:15:29,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:15:29,882 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 166 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:29,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 214 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-01-18 15:15:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 422. [2022-01-18 15:15:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.168646080760095) internal successors, (1334), 421 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1334 transitions. [2022-01-18 15:15:29,888 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1334 transitions. Word has length 20 [2022-01-18 15:15:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:29,888 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1334 transitions. [2022-01-18 15:15:29,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1334 transitions. [2022-01-18 15:15:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:29,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:29,889 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:29,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:30,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:30,089 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:30,090 INFO L85 PathProgramCache]: Analyzing trace with hash -500589450, now seen corresponding path program 86 times [2022-01-18 15:15:30,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:30,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574839918] [2022-01-18 15:15:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:30,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:30,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:30,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574839918] [2022-01-18 15:15:30,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574839918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:30,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386248310] [2022-01-18 15:15:30,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:30,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:30,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:30,173 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:30,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 15:15:30,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:30,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:30,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:30,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:30,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:15:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:30,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:30,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:30,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:30,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386248310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:30,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:30,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:15:30,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899377383] [2022-01-18 15:15:30,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:30,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:15:30,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:30,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:15:30,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:15:30,578 INFO L87 Difference]: Start difference. First operand 422 states and 1334 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:30,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:30,886 INFO L93 Difference]: Finished difference Result 669 states and 1952 transitions. [2022-01-18 15:15:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:30,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:30,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:30,887 INFO L225 Difference]: With dead ends: 669 [2022-01-18 15:15:30,887 INFO L226 Difference]: Without dead ends: 663 [2022-01-18 15:15:30,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:30,888 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:30,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 240 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-18 15:15:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 414. [2022-01-18 15:15:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.171912832929782) internal successors, (1310), 413 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1310 transitions. [2022-01-18 15:15:30,893 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1310 transitions. Word has length 20 [2022-01-18 15:15:30,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:30,894 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1310 transitions. [2022-01-18 15:15:30,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:30,894 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1310 transitions. [2022-01-18 15:15:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:30,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:30,894 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:30,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-01-18 15:15:31,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:31,095 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:31,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1643075537, now seen corresponding path program 87 times [2022-01-18 15:15:31,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:31,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589325948] [2022-01-18 15:15:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:31,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:31,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:31,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589325948] [2022-01-18 15:15:31,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589325948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:31,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393951121] [2022-01-18 15:15:31,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:31,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:31,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:31,161 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:31,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 15:15:31,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:15:31,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:31,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:31,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:31,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:31,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:31,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:15:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:31,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393951121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:31,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:31,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 15:15:31,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122688595] [2022-01-18 15:15:31,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:31,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:15:31,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:31,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:15:31,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:15:31,525 INFO L87 Difference]: Start difference. First operand 414 states and 1310 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:31,822 INFO L93 Difference]: Finished difference Result 629 states and 1898 transitions. [2022-01-18 15:15:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:31,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:31,823 INFO L225 Difference]: With dead ends: 629 [2022-01-18 15:15:31,823 INFO L226 Difference]: Without dead ends: 577 [2022-01-18 15:15:31,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:31,824 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:31,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 217 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:31,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-01-18 15:15:31,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 409. [2022-01-18 15:15:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.1495098039215685) internal successors, (1285), 408 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1285 transitions. [2022-01-18 15:15:31,829 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1285 transitions. Word has length 20 [2022-01-18 15:15:31,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:31,829 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1285 transitions. [2022-01-18 15:15:31,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:31,829 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1285 transitions. [2022-01-18 15:15:31,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:31,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:31,830 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:31,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 15:15:32,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:32,030 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:32,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:32,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1914568000, now seen corresponding path program 88 times [2022-01-18 15:15:32,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:32,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572907181] [2022-01-18 15:15:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:32,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:32,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:32,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572907181] [2022-01-18 15:15:32,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572907181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:32,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320207561] [2022-01-18 15:15:32,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:32,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:32,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:32,157 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:32,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 15:15:32,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:32,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:32,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:32,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:32,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:15:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:32,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:32,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:32,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:32,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320207561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:32,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:32,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:32,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806681191] [2022-01-18 15:15:32,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:32,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:32,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:32,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:32,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:32,598 INFO L87 Difference]: Start difference. First operand 409 states and 1285 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:32,876 INFO L93 Difference]: Finished difference Result 627 states and 1850 transitions. [2022-01-18 15:15:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:32,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:32,877 INFO L225 Difference]: With dead ends: 627 [2022-01-18 15:15:32,877 INFO L226 Difference]: Without dead ends: 627 [2022-01-18 15:15:32,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:15:32,877 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 137 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:32,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 205 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-18 15:15:32,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 401. [2022-01-18 15:15:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.1325) internal successors, (1253), 400 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1253 transitions. [2022-01-18 15:15:32,883 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1253 transitions. Word has length 20 [2022-01-18 15:15:32,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:32,883 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1253 transitions. [2022-01-18 15:15:32,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:32,883 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1253 transitions. [2022-01-18 15:15:32,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:32,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:32,883 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:32,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-18 15:15:33,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 15:15:33,084 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:33,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:33,084 INFO L85 PathProgramCache]: Analyzing trace with hash -703409540, now seen corresponding path program 89 times [2022-01-18 15:15:33,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:33,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555600554] [2022-01-18 15:15:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:33,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:33,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:33,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555600554] [2022-01-18 15:15:33,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555600554] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:33,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006376782] [2022-01-18 15:15:33,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:33,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:33,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:33,186 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:33,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 15:15:33,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:15:33,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:33,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:33,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:33,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:15:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:33,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:33,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:33,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:33,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006376782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:33,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:33,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:33,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114003473] [2022-01-18 15:15:33,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:33,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:33,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:33,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:33,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:33,637 INFO L87 Difference]: Start difference. First operand 401 states and 1253 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:34,029 INFO L93 Difference]: Finished difference Result 614 states and 1807 transitions. [2022-01-18 15:15:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:34,029 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:34,030 INFO L225 Difference]: With dead ends: 614 [2022-01-18 15:15:34,030 INFO L226 Difference]: Without dead ends: 614 [2022-01-18 15:15:34,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:15:34,031 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 182 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:34,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 239 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:34,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-18 15:15:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 408. [2022-01-18 15:15:34,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.14987714987715) internal successors, (1282), 407 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:34,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1282 transitions. [2022-01-18 15:15:34,037 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1282 transitions. Word has length 20 [2022-01-18 15:15:34,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:34,037 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1282 transitions. [2022-01-18 15:15:34,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1282 transitions. [2022-01-18 15:15:34,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:34,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:34,038 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:34,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-18 15:15:34,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:34,251 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:34,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:34,251 INFO L85 PathProgramCache]: Analyzing trace with hash 570745314, now seen corresponding path program 90 times [2022-01-18 15:15:34,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:34,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339987311] [2022-01-18 15:15:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:34,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:34,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:34,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339987311] [2022-01-18 15:15:34,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339987311] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:34,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91125344] [2022-01-18 15:15:34,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:34,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:34,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:34,350 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:34,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 15:15:34,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:15:34,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:34,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:34,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:15:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:34,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:34,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:34,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:34,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91125344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:34,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:34,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:34,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818156098] [2022-01-18 15:15:34,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:34,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:34,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:34,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:34,807 INFO L87 Difference]: Start difference. First operand 408 states and 1282 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:35,102 INFO L93 Difference]: Finished difference Result 552 states and 1664 transitions. [2022-01-18 15:15:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:35,104 INFO L225 Difference]: With dead ends: 552 [2022-01-18 15:15:35,104 INFO L226 Difference]: Without dead ends: 552 [2022-01-18 15:15:35,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:15:35,104 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:35,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 217 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:35,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-18 15:15:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 399. [2022-01-18 15:15:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.1231155778894473) internal successors, (1243), 398 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:35,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1243 transitions. [2022-01-18 15:15:35,109 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1243 transitions. Word has length 20 [2022-01-18 15:15:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:35,109 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1243 transitions. [2022-01-18 15:15:35,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:35,109 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1243 transitions. [2022-01-18 15:15:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:35,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:35,110 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:35,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:35,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:35,310 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:35,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:35,310 INFO L85 PathProgramCache]: Analyzing trace with hash -46867367, now seen corresponding path program 91 times [2022-01-18 15:15:35,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:35,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164970031] [2022-01-18 15:15:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:35,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:35,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:35,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164970031] [2022-01-18 15:15:35,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164970031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:35,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46386565] [2022-01-18 15:15:35,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:35,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:35,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:35,375 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:35,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 15:15:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:35,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:35,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:35,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:35,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:35,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:35,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:15:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:35,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46386565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:35,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:35,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 15:15:35,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691851938] [2022-01-18 15:15:35,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:35,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:15:35,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:35,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:15:35,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:15:35,708 INFO L87 Difference]: Start difference. First operand 399 states and 1243 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:35,971 INFO L93 Difference]: Finished difference Result 531 states and 1592 transitions. [2022-01-18 15:15:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:35,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:35,973 INFO L225 Difference]: With dead ends: 531 [2022-01-18 15:15:35,973 INFO L226 Difference]: Without dead ends: 469 [2022-01-18 15:15:35,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:35,973 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 94 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:35,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 196 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-18 15:15:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 393. [2022-01-18 15:15:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.0943877551020407) internal successors, (1213), 392 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1213 transitions. [2022-01-18 15:15:35,977 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1213 transitions. Word has length 20 [2022-01-18 15:15:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:35,977 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1213 transitions. [2022-01-18 15:15:35,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1213 transitions. [2022-01-18 15:15:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:35,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:35,978 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:35,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-18 15:15:36,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:36,179 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:36,179 INFO L85 PathProgramCache]: Analyzing trace with hash -180354516, now seen corresponding path program 92 times [2022-01-18 15:15:36,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:36,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690598935] [2022-01-18 15:15:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:36,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:36,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:36,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690598935] [2022-01-18 15:15:36,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690598935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:36,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763831389] [2022-01-18 15:15:36,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:36,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:36,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:36,283 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:36,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 15:15:36,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:36,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:36,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:36,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:36,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:15:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:36,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:36,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:36,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:36,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763831389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:36,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:36,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:36,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322293371] [2022-01-18 15:15:36,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:36,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:36,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:36,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:36,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:36,746 INFO L87 Difference]: Start difference. First operand 393 states and 1213 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:37,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:37,058 INFO L93 Difference]: Finished difference Result 644 states and 1881 transitions. [2022-01-18 15:15:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:37,059 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:37,060 INFO L225 Difference]: With dead ends: 644 [2022-01-18 15:15:37,060 INFO L226 Difference]: Without dead ends: 644 [2022-01-18 15:15:37,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:37,060 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 124 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:37,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 235 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-01-18 15:15:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 390. [2022-01-18 15:15:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0976863753213366) internal successors, (1205), 389 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1205 transitions. [2022-01-18 15:15:37,065 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1205 transitions. Word has length 20 [2022-01-18 15:15:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:37,065 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1205 transitions. [2022-01-18 15:15:37,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1205 transitions. [2022-01-18 15:15:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:37,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:37,066 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:37,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-18 15:15:37,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:37,266 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:37,267 INFO L85 PathProgramCache]: Analyzing trace with hash 560542818, now seen corresponding path program 93 times [2022-01-18 15:15:37,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:37,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566198969] [2022-01-18 15:15:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:37,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:37,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566198969] [2022-01-18 15:15:37,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566198969] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078300971] [2022-01-18 15:15:37,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:37,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:37,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:37,366 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:37,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 15:15:37,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:15:37,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:37,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:37,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:37,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:15:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:37,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:37,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:37,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:37,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078300971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:37,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:37,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:37,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691675655] [2022-01-18 15:15:37,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:37,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:37,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:37,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:37,832 INFO L87 Difference]: Start difference. First operand 390 states and 1205 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:38,266 INFO L93 Difference]: Finished difference Result 669 states and 1935 transitions. [2022-01-18 15:15:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:38,266 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:38,267 INFO L225 Difference]: With dead ends: 669 [2022-01-18 15:15:38,267 INFO L226 Difference]: Without dead ends: 669 [2022-01-18 15:15:38,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:15:38,267 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 150 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:38,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 282 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-18 15:15:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 383. [2022-01-18 15:15:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.107329842931937) internal successors, (1187), 382 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1187 transitions. [2022-01-18 15:15:38,273 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1187 transitions. Word has length 20 [2022-01-18 15:15:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:38,273 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1187 transitions. [2022-01-18 15:15:38,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1187 transitions. [2022-01-18 15:15:38,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:38,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:38,273 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:38,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 15:15:38,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:38,474 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:38,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:38,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1554918438, now seen corresponding path program 94 times [2022-01-18 15:15:38,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:38,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725087312] [2022-01-18 15:15:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:38,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:38,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:38,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725087312] [2022-01-18 15:15:38,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725087312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:38,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803740581] [2022-01-18 15:15:38,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:38,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:38,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:38,612 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:38,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 15:15:38,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:38,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:38,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:38,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:38,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:15:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:38,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:39,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:39,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:39,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803740581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:39,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:39,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:39,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423927446] [2022-01-18 15:15:39,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:39,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:39,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:39,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:39,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:39,110 INFO L87 Difference]: Start difference. First operand 383 states and 1187 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:39,431 INFO L93 Difference]: Finished difference Result 603 states and 1787 transitions. [2022-01-18 15:15:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:39,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:39,432 INFO L225 Difference]: With dead ends: 603 [2022-01-18 15:15:39,432 INFO L226 Difference]: Without dead ends: 603 [2022-01-18 15:15:39,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:39,432 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 148 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:39,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 220 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:39,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-18 15:15:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 380. [2022-01-18 15:15:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.0923482849604222) internal successors, (1172), 379 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1172 transitions. [2022-01-18 15:15:39,437 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1172 transitions. Word has length 20 [2022-01-18 15:15:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:39,437 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1172 transitions. [2022-01-18 15:15:39,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1172 transitions. [2022-01-18 15:15:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:39,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:39,438 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:39,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-01-18 15:15:39,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-01-18 15:15:39,647 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:39,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1759595726, now seen corresponding path program 95 times [2022-01-18 15:15:39,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:39,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441583581] [2022-01-18 15:15:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:39,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:39,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:39,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441583581] [2022-01-18 15:15:39,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441583581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:39,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958953362] [2022-01-18 15:15:39,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:39,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:39,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:39,751 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:39,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 15:15:39,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:39,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:39,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:39,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:15:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:40,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:40,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:40,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:40,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958953362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:40,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:40,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:40,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221144484] [2022-01-18 15:15:40,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:40,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:40,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:40,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:40,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:40,201 INFO L87 Difference]: Start difference. First operand 380 states and 1172 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:40,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:40,579 INFO L93 Difference]: Finished difference Result 575 states and 1689 transitions. [2022-01-18 15:15:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:40,579 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:40,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:40,580 INFO L225 Difference]: With dead ends: 575 [2022-01-18 15:15:40,580 INFO L226 Difference]: Without dead ends: 569 [2022-01-18 15:15:40,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:15:40,580 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:40,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 221 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:40,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-18 15:15:40,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 390. [2022-01-18 15:15:40,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.082262210796915) internal successors, (1199), 389 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1199 transitions. [2022-01-18 15:15:40,585 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1199 transitions. Word has length 20 [2022-01-18 15:15:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:40,585 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1199 transitions. [2022-01-18 15:15:40,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1199 transitions. [2022-01-18 15:15:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:40,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:40,586 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:40,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-18 15:15:40,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-01-18 15:15:40,786 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:40,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1735695812, now seen corresponding path program 96 times [2022-01-18 15:15:40,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:40,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863782101] [2022-01-18 15:15:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:40,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:40,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:40,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863782101] [2022-01-18 15:15:40,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863782101] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:40,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899336528] [2022-01-18 15:15:40,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:40,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:40,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:40,892 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:40,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 15:15:40,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:15:40,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:40,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:40,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:41,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:15:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:41,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:41,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:41,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:41,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899336528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:41,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:41,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:41,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028378690] [2022-01-18 15:15:41,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:41,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:41,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:41,339 INFO L87 Difference]: Start difference. First operand 390 states and 1199 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:41,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:41,600 INFO L93 Difference]: Finished difference Result 546 states and 1635 transitions. [2022-01-18 15:15:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:41,601 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:41,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:41,601 INFO L225 Difference]: With dead ends: 546 [2022-01-18 15:15:41,601 INFO L226 Difference]: Without dead ends: 546 [2022-01-18 15:15:41,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:41,602 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 86 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:41,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 172 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-18 15:15:41,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 377. [2022-01-18 15:15:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.0824468085106385) internal successors, (1159), 376 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1159 transitions. [2022-01-18 15:15:41,606 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1159 transitions. Word has length 20 [2022-01-18 15:15:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:41,606 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1159 transitions. [2022-01-18 15:15:41,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1159 transitions. [2022-01-18 15:15:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:41,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:41,607 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:41,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-18 15:15:41,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:41,807 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1985165052, now seen corresponding path program 97 times [2022-01-18 15:15:41,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:41,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706582846] [2022-01-18 15:15:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:41,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:41,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:41,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706582846] [2022-01-18 15:15:41,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706582846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:41,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612728012] [2022-01-18 15:15:41,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:41,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:41,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:41,926 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:41,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 15:15:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:42,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:42,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:42,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:15:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:42,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:42,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:42,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:42,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612728012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:42,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:42,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:42,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425429927] [2022-01-18 15:15:42,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:42,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:42,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:42,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:42,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:42,480 INFO L87 Difference]: Start difference. First operand 377 states and 1159 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:42,922 INFO L93 Difference]: Finished difference Result 467 states and 1389 transitions. [2022-01-18 15:15:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:42,922 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:42,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:42,923 INFO L225 Difference]: With dead ends: 467 [2022-01-18 15:15:42,923 INFO L226 Difference]: Without dead ends: 467 [2022-01-18 15:15:42,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:15:42,923 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 88 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:42,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 223 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-18 15:15:42,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 384. [2022-01-18 15:15:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0966057441253265) internal successors, (1186), 383 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1186 transitions. [2022-01-18 15:15:42,927 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1186 transitions. Word has length 20 [2022-01-18 15:15:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:42,928 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1186 transitions. [2022-01-18 15:15:42,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1186 transitions. [2022-01-18 15:15:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:42,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:42,928 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:42,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 15:15:43,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:43,130 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:43,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:43,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1427724810, now seen corresponding path program 98 times [2022-01-18 15:15:43,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:43,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104671891] [2022-01-18 15:15:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:43,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:43,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:43,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104671891] [2022-01-18 15:15:43,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104671891] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:43,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950731244] [2022-01-18 15:15:43,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:43,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:43,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:43,229 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:43,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 15:15:43,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:43,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:43,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:43,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:15:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:43,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:43,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:43,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:43,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950731244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:43,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:43,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:43,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068636824] [2022-01-18 15:15:43,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:43,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:43,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:43,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:43,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:43,807 INFO L87 Difference]: Start difference. First operand 384 states and 1186 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:44,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:44,215 INFO L93 Difference]: Finished difference Result 473 states and 1396 transitions. [2022-01-18 15:15:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:15:44,215 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:44,216 INFO L225 Difference]: With dead ends: 473 [2022-01-18 15:15:44,216 INFO L226 Difference]: Without dead ends: 467 [2022-01-18 15:15:44,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:44,216 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 109 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:44,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 194 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-18 15:15:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 381. [2022-01-18 15:15:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.0921052631578947) internal successors, (1175), 380 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:44,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1175 transitions. [2022-01-18 15:15:44,221 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1175 transitions. Word has length 20 [2022-01-18 15:15:44,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:44,221 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1175 transitions. [2022-01-18 15:15:44,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:44,221 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1175 transitions. [2022-01-18 15:15:44,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:44,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:44,221 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:44,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 15:15:44,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-18 15:15:44,422 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:44,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1962954612, now seen corresponding path program 99 times [2022-01-18 15:15:44,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:44,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105944388] [2022-01-18 15:15:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:44,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:44,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105944388] [2022-01-18 15:15:44,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105944388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198680609] [2022-01-18 15:15:44,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:44,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:44,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:44,502 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:44,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 15:15:44,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:15:44,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:44,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:44,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:44,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:44,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:44,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:44,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:45,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198680609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:45,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:45,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:45,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388783187] [2022-01-18 15:15:45,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:45,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:45,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:45,003 INFO L87 Difference]: Start difference. First operand 381 states and 1175 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:45,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:45,514 INFO L93 Difference]: Finished difference Result 437 states and 1314 transitions. [2022-01-18 15:15:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:45,514 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:45,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:45,515 INFO L225 Difference]: With dead ends: 437 [2022-01-18 15:15:45,515 INFO L226 Difference]: Without dead ends: 425 [2022-01-18 15:15:45,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:15:45,515 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:45,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 204 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:45,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-01-18 15:15:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 378. [2022-01-18 15:15:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.0875331564986737) internal successors, (1164), 377 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1164 transitions. [2022-01-18 15:15:45,519 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1164 transitions. Word has length 20 [2022-01-18 15:15:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:45,519 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1164 transitions. [2022-01-18 15:15:45,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:45,519 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1164 transitions. [2022-01-18 15:15:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:45,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:45,520 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:45,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 15:15:45,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:45,720 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:45,720 INFO L85 PathProgramCache]: Analyzing trace with hash -816821370, now seen corresponding path program 100 times [2022-01-18 15:15:45,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:45,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466802103] [2022-01-18 15:15:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:45,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:45,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:45,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466802103] [2022-01-18 15:15:45,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466802103] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:45,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674117927] [2022-01-18 15:15:45,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:45,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:45,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:45,834 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:45,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 15:15:45,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:45,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:45,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:45,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:46,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-01-18 15:15:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:46,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:46,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:46,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:46,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674117927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:46,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:46,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:46,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110866766] [2022-01-18 15:15:46,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:46,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:46,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:46,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:46,377 INFO L87 Difference]: Start difference. First operand 378 states and 1164 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:46,816 INFO L93 Difference]: Finished difference Result 551 states and 1599 transitions. [2022-01-18 15:15:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:46,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:46,817 INFO L225 Difference]: With dead ends: 551 [2022-01-18 15:15:46,817 INFO L226 Difference]: Without dead ends: 551 [2022-01-18 15:15:46,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:15:46,818 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 162 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:46,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 242 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:46,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-18 15:15:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 386. [2022-01-18 15:15:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.116883116883117) internal successors, (1200), 385 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1200 transitions. [2022-01-18 15:15:46,823 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1200 transitions. Word has length 20 [2022-01-18 15:15:46,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:46,823 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1200 transitions. [2022-01-18 15:15:46,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:46,823 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1200 transitions. [2022-01-18 15:15:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:46,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:46,823 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:46,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 15:15:47,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:47,024 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:47,024 INFO L85 PathProgramCache]: Analyzing trace with hash 65256064, now seen corresponding path program 101 times [2022-01-18 15:15:47,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:47,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697783146] [2022-01-18 15:15:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:47,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:47,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:47,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697783146] [2022-01-18 15:15:47,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697783146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:47,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21427058] [2022-01-18 15:15:47,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:47,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:47,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:47,138 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:47,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 15:15:47,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:47,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:47,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:47,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:47,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:15:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:47,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:47,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:47,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:47,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21427058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:47,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:47,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:47,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994058123] [2022-01-18 15:15:47,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:47,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:47,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:47,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:47,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:47,656 INFO L87 Difference]: Start difference. First operand 386 states and 1200 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:48,155 INFO L93 Difference]: Finished difference Result 557 states and 1600 transitions. [2022-01-18 15:15:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:15:48,156 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:48,156 INFO L225 Difference]: With dead ends: 557 [2022-01-18 15:15:48,156 INFO L226 Difference]: Without dead ends: 551 [2022-01-18 15:15:48,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:15:48,157 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 136 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:48,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 302 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:48,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-18 15:15:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 389. [2022-01-18 15:15:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.097938144329897) internal successors, (1202), 388 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1202 transitions. [2022-01-18 15:15:48,161 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1202 transitions. Word has length 20 [2022-01-18 15:15:48,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:48,162 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1202 transitions. [2022-01-18 15:15:48,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1202 transitions. [2022-01-18 15:15:48,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:48,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:48,162 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:48,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-18 15:15:48,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 15:15:48,363 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash -75924036, now seen corresponding path program 102 times [2022-01-18 15:15:48,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:48,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538220182] [2022-01-18 15:15:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:48,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:48,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:48,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538220182] [2022-01-18 15:15:48,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538220182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:48,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331524580] [2022-01-18 15:15:48,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:48,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:48,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:48,480 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:48,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 15:15:48,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:15:48,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:48,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:48,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:48,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:15:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:48,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:48,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:48,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:49,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331524580] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:49,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:49,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:49,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513053244] [2022-01-18 15:15:49,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:49,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:49,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:49,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:49,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:49,039 INFO L87 Difference]: Start difference. First operand 389 states and 1202 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:49,499 INFO L93 Difference]: Finished difference Result 548 states and 1586 transitions. [2022-01-18 15:15:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:49,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:49,501 INFO L225 Difference]: With dead ends: 548 [2022-01-18 15:15:49,501 INFO L226 Difference]: Without dead ends: 548 [2022-01-18 15:15:49,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:15:49,501 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 145 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:49,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 235 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-18 15:15:49,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 382. [2022-01-18 15:15:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.1076115485564304) internal successors, (1184), 381 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1184 transitions. [2022-01-18 15:15:49,506 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1184 transitions. Word has length 20 [2022-01-18 15:15:49,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:49,506 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1184 transitions. [2022-01-18 15:15:49,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1184 transitions. [2022-01-18 15:15:49,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:49,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:49,506 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:49,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:49,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 15:15:49,722 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:49,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:49,722 INFO L85 PathProgramCache]: Analyzing trace with hash 918451584, now seen corresponding path program 103 times [2022-01-18 15:15:49,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:49,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159040208] [2022-01-18 15:15:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:49,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:49,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:49,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159040208] [2022-01-18 15:15:49,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159040208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:49,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847330829] [2022-01-18 15:15:49,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:49,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:49,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:49,827 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:49,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 15:15:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:49,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:49,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:50,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-01-18 15:15:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:50,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:50,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:50,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:50,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847330829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:50,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:50,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:50,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245291215] [2022-01-18 15:15:50,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:50,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:50,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:50,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:50,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:50,393 INFO L87 Difference]: Start difference. First operand 382 states and 1184 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:50,710 INFO L93 Difference]: Finished difference Result 482 states and 1438 transitions. [2022-01-18 15:15:50,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:50,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:50,711 INFO L225 Difference]: With dead ends: 482 [2022-01-18 15:15:50,711 INFO L226 Difference]: Without dead ends: 482 [2022-01-18 15:15:50,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:15:50,711 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 99 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:50,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 161 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-18 15:15:50,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 379. [2022-01-18 15:15:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.0925925925925926) internal successors, (1169), 378 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1169 transitions. [2022-01-18 15:15:50,716 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1169 transitions. Word has length 20 [2022-01-18 15:15:50,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:50,716 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1169 transitions. [2022-01-18 15:15:50,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1169 transitions. [2022-01-18 15:15:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:50,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:50,716 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:50,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 15:15:50,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:50,917 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:50,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1898904716, now seen corresponding path program 104 times [2022-01-18 15:15:50,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:50,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127442423] [2022-01-18 15:15:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:50,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:51,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:51,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127442423] [2022-01-18 15:15:51,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127442423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:51,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676184964] [2022-01-18 15:15:51,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:51,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:51,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:51,025 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:51,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 15:15:51,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:51,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:51,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:51,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:51,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:15:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:51,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:51,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:51,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:51,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676184964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:51,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:51,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:51,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706791951] [2022-01-18 15:15:51,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:51,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:51,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:51,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:51,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:51,575 INFO L87 Difference]: Start difference. First operand 379 states and 1169 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:52,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:52,145 INFO L93 Difference]: Finished difference Result 525 states and 1527 transitions. [2022-01-18 15:15:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:15:52,145 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:52,153 INFO L225 Difference]: With dead ends: 525 [2022-01-18 15:15:52,153 INFO L226 Difference]: Without dead ends: 519 [2022-01-18 15:15:52,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:15:52,153 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 166 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:52,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 251 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-18 15:15:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 389. [2022-01-18 15:15:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.082474226804124) internal successors, (1196), 388 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1196 transitions. [2022-01-18 15:15:52,159 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1196 transitions. Word has length 20 [2022-01-18 15:15:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:52,160 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1196 transitions. [2022-01-18 15:15:52,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:52,160 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1196 transitions. [2022-01-18 15:15:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:52,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:52,160 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:52,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 15:15:52,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:52,361 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:52,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:52,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1922804630, now seen corresponding path program 105 times [2022-01-18 15:15:52,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:52,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174978466] [2022-01-18 15:15:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:52,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:52,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:52,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174978466] [2022-01-18 15:15:52,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174978466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:52,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467968369] [2022-01-18 15:15:52,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:52,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:52,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:52,527 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:52,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 15:15:52,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:15:52,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:52,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:52,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:52,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-01-18 15:15:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:52,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:53,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:53,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:53,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467968369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:53,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:53,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:15:53,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544604169] [2022-01-18 15:15:53,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:53,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:53,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:53,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:53,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:53,152 INFO L87 Difference]: Start difference. First operand 389 states and 1196 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:53,553 INFO L93 Difference]: Finished difference Result 496 states and 1473 transitions. [2022-01-18 15:15:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:53,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:53,554 INFO L225 Difference]: With dead ends: 496 [2022-01-18 15:15:53,554 INFO L226 Difference]: Without dead ends: 496 [2022-01-18 15:15:53,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:15:53,554 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 112 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:53,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 185 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:53,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-18 15:15:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 378. [2022-01-18 15:15:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.0875331564986737) internal successors, (1164), 377 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1164 transitions. [2022-01-18 15:15:53,559 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1164 transitions. Word has length 20 [2022-01-18 15:15:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:53,559 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1164 transitions. [2022-01-18 15:15:53,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1164 transitions. [2022-01-18 15:15:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:53,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:53,560 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:53,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-18 15:15:53,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-01-18 15:15:53,760 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:53,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:53,760 INFO L85 PathProgramCache]: Analyzing trace with hash -954421248, now seen corresponding path program 106 times [2022-01-18 15:15:53,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:53,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511415684] [2022-01-18 15:15:53,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:53,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:53,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:53,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511415684] [2022-01-18 15:15:53,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511415684] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:53,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301668635] [2022-01-18 15:15:53,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:53,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:53,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:53,843 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:53,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 15:15:53,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:53,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:53,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:53,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:54,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:54,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:54,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:54,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:54,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301668635] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:54,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:54,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:54,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558203511] [2022-01-18 15:15:54,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:54,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:54,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:54,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:54,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:54,326 INFO L87 Difference]: Start difference. First operand 378 states and 1164 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:54,727 INFO L93 Difference]: Finished difference Result 428 states and 1290 transitions. [2022-01-18 15:15:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:54,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:54,728 INFO L225 Difference]: With dead ends: 428 [2022-01-18 15:15:54,728 INFO L226 Difference]: Without dead ends: 416 [2022-01-18 15:15:54,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:15:54,729 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:54,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 147 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-01-18 15:15:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 380. [2022-01-18 15:15:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.0844327176781) internal successors, (1169), 379 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1169 transitions. [2022-01-18 15:15:54,733 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1169 transitions. Word has length 20 [2022-01-18 15:15:54,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:54,733 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1169 transitions. [2022-01-18 15:15:54,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1169 transitions. [2022-01-18 15:15:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:54,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:54,733 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:54,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:54,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-01-18 15:15:54,934 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash -213523914, now seen corresponding path program 107 times [2022-01-18 15:15:54,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:54,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543980142] [2022-01-18 15:15:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:54,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:55,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:55,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543980142] [2022-01-18 15:15:55,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543980142] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:55,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390259924] [2022-01-18 15:15:55,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:55,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:55,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:55,034 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:55,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 15:15:55,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:55,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:55,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:55,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:55,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:15:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:55,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:55,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:55,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:55,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390259924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:55,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:55,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:55,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636154773] [2022-01-18 15:15:55,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:55,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:55,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:55,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:55,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:55,550 INFO L87 Difference]: Start difference. First operand 380 states and 1169 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:56,006 INFO L93 Difference]: Finished difference Result 453 states and 1342 transitions. [2022-01-18 15:15:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:56,006 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:56,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:56,007 INFO L225 Difference]: With dead ends: 453 [2022-01-18 15:15:56,007 INFO L226 Difference]: Without dead ends: 447 [2022-01-18 15:15:56,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:15:56,008 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:56,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 181 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-18 15:15:56,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 390. [2022-01-18 15:15:56,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0745501285347046) internal successors, (1196), 389 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1196 transitions. [2022-01-18 15:15:56,012 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1196 transitions. Word has length 20 [2022-01-18 15:15:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:56,012 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1196 transitions. [2022-01-18 15:15:56,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1196 transitions. [2022-01-18 15:15:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:56,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:56,013 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:56,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:56,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:56,213 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:56,213 INFO L85 PathProgramCache]: Analyzing trace with hash -189624000, now seen corresponding path program 108 times [2022-01-18 15:15:56,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:56,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313037627] [2022-01-18 15:15:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:56,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:56,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:56,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313037627] [2022-01-18 15:15:56,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313037627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:56,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180886152] [2022-01-18 15:15:56,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:56,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:56,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:56,299 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:56,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 15:15:56,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:15:56,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:56,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:56,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:56,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:15:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:56,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:56,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:56,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:15:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:56,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180886152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:56,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:56,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:15:56,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453958685] [2022-01-18 15:15:56,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:56,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:15:56,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:56,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:15:56,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:15:56,796 INFO L87 Difference]: Start difference. First operand 390 states and 1196 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:57,032 INFO L93 Difference]: Finished difference Result 424 states and 1288 transitions. [2022-01-18 15:15:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:57,033 INFO L225 Difference]: With dead ends: 424 [2022-01-18 15:15:57,033 INFO L226 Difference]: Without dead ends: 424 [2022-01-18 15:15:57,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:57,033 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:57,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 100 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:15:57,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-18 15:15:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 375. [2022-01-18 15:15:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.0775401069518717) internal successors, (1151), 374 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1151 transitions. [2022-01-18 15:15:57,037 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1151 transitions. Word has length 20 [2022-01-18 15:15:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:57,037 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1151 transitions. [2022-01-18 15:15:57,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1151 transitions. [2022-01-18 15:15:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:57,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:57,038 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:57,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:57,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:57,239 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:57,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1663184868, now seen corresponding path program 109 times [2022-01-18 15:15:57,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:57,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320702824] [2022-01-18 15:15:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:57,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:57,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320702824] [2022-01-18 15:15:57,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320702824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318700659] [2022-01-18 15:15:57,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:57,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:57,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:57,332 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:57,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 15:15:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:57,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:57,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:57,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:57,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:57,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:57,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:15:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:57,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318700659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:57,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:57,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:57,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683309249] [2022-01-18 15:15:57,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:57,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:57,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:57,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:57,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:57,702 INFO L87 Difference]: Start difference. First operand 375 states and 1151 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:57,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:57,941 INFO L93 Difference]: Finished difference Result 567 states and 1682 transitions. [2022-01-18 15:15:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:57,941 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:57,942 INFO L225 Difference]: With dead ends: 567 [2022-01-18 15:15:57,942 INFO L226 Difference]: Without dead ends: 567 [2022-01-18 15:15:57,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:57,942 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 123 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:57,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 194 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-18 15:15:57,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 391. [2022-01-18 15:15:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.1025641025641026) internal successors, (1210), 390 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1210 transitions. [2022-01-18 15:15:57,947 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1210 transitions. Word has length 20 [2022-01-18 15:15:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:57,947 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1210 transitions. [2022-01-18 15:15:57,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1210 transitions. [2022-01-18 15:15:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:57,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:57,947 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:57,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:58,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-01-18 15:15:58,148 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:58,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:58,148 INFO L85 PathProgramCache]: Analyzing trace with hash 361697122, now seen corresponding path program 110 times [2022-01-18 15:15:58,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:58,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852903704] [2022-01-18 15:15:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:58,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:58,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:58,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852903704] [2022-01-18 15:15:58,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852903704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:58,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971714918] [2022-01-18 15:15:58,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:58,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:58,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:58,225 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:58,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 15:15:58,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:58,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:58,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:58,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:58,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:58,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:58,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:58,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:15:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:58,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971714918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:58,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:58,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:15:58,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180334921] [2022-01-18 15:15:58,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:58,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:58,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:58,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:58,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:58,638 INFO L87 Difference]: Start difference. First operand 391 states and 1210 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:58,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:58,931 INFO L93 Difference]: Finished difference Result 619 states and 1803 transitions. [2022-01-18 15:15:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:58,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:58,932 INFO L225 Difference]: With dead ends: 619 [2022-01-18 15:15:58,932 INFO L226 Difference]: Without dead ends: 619 [2022-01-18 15:15:58,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:58,933 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 163 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:58,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 209 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-18 15:15:58,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 397. [2022-01-18 15:15:58,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.1186868686868685) internal successors, (1235), 396 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:58,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1235 transitions. [2022-01-18 15:15:58,937 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1235 transitions. Word has length 20 [2022-01-18 15:15:58,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:58,938 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1235 transitions. [2022-01-18 15:15:58,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1235 transitions. [2022-01-18 15:15:58,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:58,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:58,938 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:58,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:59,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 15:15:59,139 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:59,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:59,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1243774556, now seen corresponding path program 111 times [2022-01-18 15:15:59,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:59,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261013901] [2022-01-18 15:15:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:59,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:59,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:59,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261013901] [2022-01-18 15:15:59,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261013901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:59,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537734992] [2022-01-18 15:15:59,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:59,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:59,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:59,222 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:59,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 15:15:59,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:15:59,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:59,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:15:59,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:59,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:15:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:59,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:59,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:59,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:15:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:59,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537734992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:59,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:59,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:15:59,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414225194] [2022-01-18 15:15:59,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:59,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:15:59,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:59,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:15:59,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:15:59,594 INFO L87 Difference]: Start difference. First operand 397 states and 1235 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:59,809 INFO L93 Difference]: Finished difference Result 576 states and 1694 transitions. [2022-01-18 15:15:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:15:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:59,810 INFO L225 Difference]: With dead ends: 576 [2022-01-18 15:15:59,810 INFO L226 Difference]: Without dead ends: 570 [2022-01-18 15:15:59,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:59,811 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 137 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:59,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 184 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-18 15:15:59,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 395. [2022-01-18 15:15:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.1065989847715736) internal successors, (1224), 394 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:59,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1224 transitions. [2022-01-18 15:15:59,815 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1224 transitions. Word has length 20 [2022-01-18 15:15:59,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:59,815 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1224 transitions. [2022-01-18 15:15:59,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1224 transitions. [2022-01-18 15:15:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:15:59,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:59,816 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:59,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-18 15:16:00,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 15:16:00,026 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:00,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:00,026 INFO L85 PathProgramCache]: Analyzing trace with hash 710005027, now seen corresponding path program 112 times [2022-01-18 15:16:00,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:00,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035524734] [2022-01-18 15:16:00,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:00,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:00,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:00,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035524734] [2022-01-18 15:16:00,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035524734] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:00,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998686289] [2022-01-18 15:16:00,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:00,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:00,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:00,088 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:00,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 15:16:00,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:00,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:00,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:00,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:00,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:16:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:00,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:00,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:00,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:00,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998686289] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:00,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:00,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 15:16:00,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832510203] [2022-01-18 15:16:00,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:00,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:16:00,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:00,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:16:00,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:16:00,517 INFO L87 Difference]: Start difference. First operand 395 states and 1224 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:00,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:00,813 INFO L93 Difference]: Finished difference Result 566 states and 1686 transitions. [2022-01-18 15:16:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:16:00,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:00,814 INFO L225 Difference]: With dead ends: 566 [2022-01-18 15:16:00,814 INFO L226 Difference]: Without dead ends: 514 [2022-01-18 15:16:00,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:00,814 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 162 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:00,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 143 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-18 15:16:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 401. [2022-01-18 15:16:00,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.1275) internal successors, (1251), 400 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:00,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1251 transitions. [2022-01-18 15:16:00,819 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1251 transitions. Word has length 20 [2022-01-18 15:16:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:00,819 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1251 transitions. [2022-01-18 15:16:00,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1251 transitions. [2022-01-18 15:16:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:00,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:00,820 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:00,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-18 15:16:01,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 15:16:01,020 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:01,020 INFO L85 PathProgramCache]: Analyzing trace with hash -170203994, now seen corresponding path program 113 times [2022-01-18 15:16:01,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:01,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271506322] [2022-01-18 15:16:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:01,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:01,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:01,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271506322] [2022-01-18 15:16:01,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271506322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:01,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876471390] [2022-01-18 15:16:01,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:01,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:01,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:01,113 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:01,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 15:16:01,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:16:01,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:01,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:01,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:01,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:01,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:01,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:01,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:01,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876471390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:01,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:01,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:01,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668703023] [2022-01-18 15:16:01,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:01,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:01,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:01,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:01,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:01,500 INFO L87 Difference]: Start difference. First operand 401 states and 1251 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:01,761 INFO L93 Difference]: Finished difference Result 679 states and 1992 transitions. [2022-01-18 15:16:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:01,762 INFO L225 Difference]: With dead ends: 679 [2022-01-18 15:16:01,762 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 15:16:01,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:01,763 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 137 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:01,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 232 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 15:16:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 403. [2022-01-18 15:16:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.13681592039801) internal successors, (1261), 402 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1261 transitions. [2022-01-18 15:16:01,768 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1261 transitions. Word has length 20 [2022-01-18 15:16:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:01,768 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1261 transitions. [2022-01-18 15:16:01,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1261 transitions. [2022-01-18 15:16:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:01,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:01,769 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:01,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-18 15:16:01,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:01,969 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:01,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1040954466, now seen corresponding path program 114 times [2022-01-18 15:16:01,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:01,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341462713] [2022-01-18 15:16:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:01,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:02,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341462713] [2022-01-18 15:16:02,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341462713] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473790459] [2022-01-18 15:16:02,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:02,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:02,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:02,057 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:02,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 15:16:02,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:16:02,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:02,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:02,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:02,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:02,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:02,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:02,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473790459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:02,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:02,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:02,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931365077] [2022-01-18 15:16:02,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:02,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:02,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:02,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:02,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:02,499 INFO L87 Difference]: Start difference. First operand 403 states and 1261 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:02,711 INFO L93 Difference]: Finished difference Result 646 states and 1910 transitions. [2022-01-18 15:16:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:02,712 INFO L225 Difference]: With dead ends: 646 [2022-01-18 15:16:02,712 INFO L226 Difference]: Without dead ends: 646 [2022-01-18 15:16:02,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:02,712 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 160 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:02,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 180 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-18 15:16:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 410. [2022-01-18 15:16:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.154034229828851) internal successors, (1290), 409 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1290 transitions. [2022-01-18 15:16:02,718 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1290 transitions. Word has length 20 [2022-01-18 15:16:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:02,718 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1290 transitions. [2022-01-18 15:16:02,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1290 transitions. [2022-01-18 15:16:02,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:02,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:02,718 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:02,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:02,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:02,931 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:02,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:02,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1979857976, now seen corresponding path program 115 times [2022-01-18 15:16:02,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:02,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348743820] [2022-01-18 15:16:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:02,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:03,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:03,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348743820] [2022-01-18 15:16:03,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348743820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:03,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662849992] [2022-01-18 15:16:03,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:03,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:03,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:03,043 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:03,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 15:16:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:03,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:03,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:03,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:03,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:03,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:03,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:03,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662849992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:03,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:03,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:03,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490704031] [2022-01-18 15:16:03,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:03,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:03,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:03,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:03,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:03,484 INFO L87 Difference]: Start difference. First operand 410 states and 1290 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:03,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:03,728 INFO L93 Difference]: Finished difference Result 613 states and 1833 transitions. [2022-01-18 15:16:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:03,728 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:03,729 INFO L225 Difference]: With dead ends: 613 [2022-01-18 15:16:03,729 INFO L226 Difference]: Without dead ends: 613 [2022-01-18 15:16:03,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:03,729 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:03,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 215 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-18 15:16:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 401. [2022-01-18 15:16:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.1275) internal successors, (1251), 400 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1251 transitions. [2022-01-18 15:16:03,734 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1251 transitions. Word has length 20 [2022-01-18 15:16:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:03,734 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1251 transitions. [2022-01-18 15:16:03,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1251 transitions. [2022-01-18 15:16:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:03,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:03,735 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:03,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:03,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-01-18 15:16:03,936 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1697496639, now seen corresponding path program 116 times [2022-01-18 15:16:03,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:03,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052523945] [2022-01-18 15:16:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:03,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:04,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:04,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052523945] [2022-01-18 15:16:04,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052523945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:04,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383437873] [2022-01-18 15:16:04,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:04,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:04,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:04,015 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:04,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 15:16:04,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:04,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:04,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:04,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:04,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:16:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:04,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:04,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:04,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:04,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383437873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:04,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:04,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 15:16:04,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768493120] [2022-01-18 15:16:04,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:04,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:16:04,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:04,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:16:04,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:16:04,453 INFO L87 Difference]: Start difference. First operand 401 states and 1251 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:04,748 INFO L93 Difference]: Finished difference Result 567 states and 1668 transitions. [2022-01-18 15:16:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:04,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:04,749 INFO L225 Difference]: With dead ends: 567 [2022-01-18 15:16:04,749 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 15:16:04,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:04,749 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 111 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:04,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 190 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 15:16:04,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 398. [2022-01-18 15:16:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.1083123425692696) internal successors, (1234), 397 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1234 transitions. [2022-01-18 15:16:04,754 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1234 transitions. Word has length 20 [2022-01-18 15:16:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:04,754 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1234 transitions. [2022-01-18 15:16:04,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:04,754 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1234 transitions. [2022-01-18 15:16:04,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:04,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:04,754 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:04,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 15:16:04,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:04,955 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:04,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:04,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1564009490, now seen corresponding path program 117 times [2022-01-18 15:16:04,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:04,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343327247] [2022-01-18 15:16:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:04,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:05,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:05,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343327247] [2022-01-18 15:16:05,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343327247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:05,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808436521] [2022-01-18 15:16:05,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:05,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:05,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:05,046 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:05,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 15:16:05,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:05,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:05,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:05,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:05,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:05,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:05,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:05,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:05,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808436521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:05,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:05,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:05,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247176497] [2022-01-18 15:16:05,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:05,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:05,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:05,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:05,504 INFO L87 Difference]: Start difference. First operand 398 states and 1234 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:05,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:05,840 INFO L93 Difference]: Finished difference Result 746 states and 2119 transitions. [2022-01-18 15:16:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:05,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:05,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:05,841 INFO L225 Difference]: With dead ends: 746 [2022-01-18 15:16:05,841 INFO L226 Difference]: Without dead ends: 746 [2022-01-18 15:16:05,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:05,842 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 186 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:05,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 250 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-01-18 15:16:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 406. [2022-01-18 15:16:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.1358024691358026) internal successors, (1270), 405 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1270 transitions. [2022-01-18 15:16:05,847 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1270 transitions. Word has length 20 [2022-01-18 15:16:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:05,847 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1270 transitions. [2022-01-18 15:16:05,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1270 transitions. [2022-01-18 15:16:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:05,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:05,848 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:05,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:06,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:06,049 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:06,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:06,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1848880372, now seen corresponding path program 118 times [2022-01-18 15:16:06,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:06,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570214524] [2022-01-18 15:16:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:06,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:06,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:06,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570214524] [2022-01-18 15:16:06,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570214524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:06,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005214426] [2022-01-18 15:16:06,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:06,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:06,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:06,134 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:06,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 15:16:06,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:06,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:06,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:06,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:06,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:06,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:06,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:06,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:06,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005214426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:06,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:06,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:16:06,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226742293] [2022-01-18 15:16:06,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:06,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:06,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:06,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:06,557 INFO L87 Difference]: Start difference. First operand 406 states and 1270 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:06,792 INFO L93 Difference]: Finished difference Result 680 states and 1965 transitions. [2022-01-18 15:16:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:06,792 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:06,793 INFO L225 Difference]: With dead ends: 680 [2022-01-18 15:16:06,793 INFO L226 Difference]: Without dead ends: 674 [2022-01-18 15:16:06,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:06,794 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 160 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:06,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 185 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:06,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-18 15:16:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 400. [2022-01-18 15:16:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.1203007518796992) internal successors, (1245), 399 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1245 transitions. [2022-01-18 15:16:06,799 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1245 transitions. Word has length 20 [2022-01-18 15:16:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:06,799 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1245 transitions. [2022-01-18 15:16:06,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1245 transitions. [2022-01-18 15:16:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:06,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:06,799 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:06,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:07,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-01-18 15:16:07,015 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:07,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1990060472, now seen corresponding path program 119 times [2022-01-18 15:16:07,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:07,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509239952] [2022-01-18 15:16:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:07,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:07,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:07,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509239952] [2022-01-18 15:16:07,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509239952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:07,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794941429] [2022-01-18 15:16:07,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:07,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:07,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:07,113 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:07,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 15:16:07,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:16:07,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:07,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:07,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:07,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:07,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:07,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:07,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:07,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794941429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:07,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:07,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:07,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118692768] [2022-01-18 15:16:07,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:07,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:07,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:07,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:07,568 INFO L87 Difference]: Start difference. First operand 400 states and 1245 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:07,818 INFO L93 Difference]: Finished difference Result 705 states and 2054 transitions. [2022-01-18 15:16:07,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:07,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:07,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:07,819 INFO L225 Difference]: With dead ends: 705 [2022-01-18 15:16:07,819 INFO L226 Difference]: Without dead ends: 705 [2022-01-18 15:16:07,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:07,819 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 136 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:07,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 194 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-01-18 15:16:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 403. [2022-01-18 15:16:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.1343283582089554) internal successors, (1260), 402 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1260 transitions. [2022-01-18 15:16:07,825 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1260 transitions. Word has length 20 [2022-01-18 15:16:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:07,825 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1260 transitions. [2022-01-18 15:16:07,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1260 transitions. [2022-01-18 15:16:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:07,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:07,825 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:07,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-18 15:16:08,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:08,027 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:08,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:08,027 INFO L85 PathProgramCache]: Analyzing trace with hash -995684852, now seen corresponding path program 120 times [2022-01-18 15:16:08,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:08,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725522122] [2022-01-18 15:16:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:08,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:08,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:08,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725522122] [2022-01-18 15:16:08,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725522122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:08,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90063011] [2022-01-18 15:16:08,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:08,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:08,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:08,125 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:08,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 15:16:08,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:16:08,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:08,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:08,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:08,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:08,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:08,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:08,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:08,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90063011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:08,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:08,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:08,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350704822] [2022-01-18 15:16:08,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:08,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:08,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:08,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:08,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:08,589 INFO L87 Difference]: Start difference. First operand 403 states and 1260 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:08,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:08,874 INFO L93 Difference]: Finished difference Result 674 states and 1987 transitions. [2022-01-18 15:16:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:08,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:08,875 INFO L225 Difference]: With dead ends: 674 [2022-01-18 15:16:08,876 INFO L226 Difference]: Without dead ends: 674 [2022-01-18 15:16:08,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:08,876 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:08,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 234 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-18 15:16:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 400. [2022-01-18 15:16:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.1203007518796992) internal successors, (1245), 399 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1245 transitions. [2022-01-18 15:16:08,881 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1245 transitions. Word has length 20 [2022-01-18 15:16:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:08,881 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1245 transitions. [2022-01-18 15:16:08,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1245 transitions. [2022-01-18 15:16:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:08,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:08,882 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:08,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-18 15:16:09,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:09,082 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:09,083 INFO L85 PathProgramCache]: Analyzing trace with hash -15231720, now seen corresponding path program 121 times [2022-01-18 15:16:09,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:09,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451544611] [2022-01-18 15:16:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:09,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:09,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:09,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451544611] [2022-01-18 15:16:09,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451544611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:09,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960490568] [2022-01-18 15:16:09,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:09,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:09,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:09,182 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:09,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 15:16:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:09,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:09,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:09,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:09,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:09,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960490568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:09,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:09,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:16:09,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514477225] [2022-01-18 15:16:09,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:09,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:09,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:09,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:09,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:09,609 INFO L87 Difference]: Start difference. First operand 400 states and 1245 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:09,827 INFO L93 Difference]: Finished difference Result 628 states and 1834 transitions. [2022-01-18 15:16:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:09,827 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:09,828 INFO L225 Difference]: With dead ends: 628 [2022-01-18 15:16:09,828 INFO L226 Difference]: Without dead ends: 622 [2022-01-18 15:16:09,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:09,828 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 121 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:09,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 175 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-18 15:16:09,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 404. [2022-01-18 15:16:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.1240694789081886) internal successors, (1259), 403 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1259 transitions. [2022-01-18 15:16:09,833 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1259 transitions. Word has length 20 [2022-01-18 15:16:09,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:09,833 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1259 transitions. [2022-01-18 15:16:09,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1259 transitions. [2022-01-18 15:16:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:09,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:09,834 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:09,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:10,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 15:16:10,034 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:10,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:10,035 INFO L85 PathProgramCache]: Analyzing trace with hash 8668194, now seen corresponding path program 122 times [2022-01-18 15:16:10,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:10,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512714053] [2022-01-18 15:16:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:10,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:10,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:10,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512714053] [2022-01-18 15:16:10,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512714053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:10,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111010126] [2022-01-18 15:16:10,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:10,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:10,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:10,129 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:10,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 15:16:10,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:10,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:10,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:10,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:10,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:10,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:10,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:10,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111010126] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:10,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:10,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:10,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171280222] [2022-01-18 15:16:10,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:10,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:10,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:10,548 INFO L87 Difference]: Start difference. First operand 404 states and 1259 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:10,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:10,829 INFO L93 Difference]: Finished difference Result 634 states and 1855 transitions. [2022-01-18 15:16:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:16:10,830 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:10,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:10,830 INFO L225 Difference]: With dead ends: 634 [2022-01-18 15:16:10,830 INFO L226 Difference]: Without dead ends: 634 [2022-01-18 15:16:10,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:10,831 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 114 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:10,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 248 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:10,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-18 15:16:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 399. [2022-01-18 15:16:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.1180904522613067) internal successors, (1241), 398 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1241 transitions. [2022-01-18 15:16:10,836 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1241 transitions. Word has length 20 [2022-01-18 15:16:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:10,836 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1241 transitions. [2022-01-18 15:16:10,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1241 transitions. [2022-01-18 15:16:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:10,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:10,836 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:10,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-18 15:16:11,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:11,037 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:11,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:11,037 INFO L85 PathProgramCache]: Analyzing trace with hash -806670848, now seen corresponding path program 123 times [2022-01-18 15:16:11,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:11,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120133243] [2022-01-18 15:16:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:11,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:11,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:11,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120133243] [2022-01-18 15:16:11,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120133243] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:11,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097196082] [2022-01-18 15:16:11,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:11,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:11,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:11,128 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:11,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 15:16:11,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:11,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:11,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:11,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:16:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:11,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:11,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:11,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:11,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097196082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:11,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:11,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:11,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013254369] [2022-01-18 15:16:11,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:11,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:11,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:11,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:11,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:11,491 INFO L87 Difference]: Start difference. First operand 399 states and 1241 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:11,731 INFO L93 Difference]: Finished difference Result 552 states and 1662 transitions. [2022-01-18 15:16:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:11,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:11,732 INFO L225 Difference]: With dead ends: 552 [2022-01-18 15:16:11,732 INFO L226 Difference]: Without dead ends: 552 [2022-01-18 15:16:11,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:11,732 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 105 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:11,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 199 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:11,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-18 15:16:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 394. [2022-01-18 15:16:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.1119592875318065) internal successors, (1223), 393 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1223 transitions. [2022-01-18 15:16:11,737 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1223 transitions. Word has length 20 [2022-01-18 15:16:11,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:11,737 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1223 transitions. [2022-01-18 15:16:11,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:11,737 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1223 transitions. [2022-01-18 15:16:11,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:11,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:11,738 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:11,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:11,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-18 15:16:11,938 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash 404487612, now seen corresponding path program 124 times [2022-01-18 15:16:11,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:11,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403131185] [2022-01-18 15:16:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:11,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:12,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:12,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403131185] [2022-01-18 15:16:12,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403131185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:12,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148331349] [2022-01-18 15:16:12,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:12,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:12,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:12,022 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:12,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 15:16:12,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:12,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:12,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:12,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:12,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:16:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:12,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:12,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:12,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:12,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148331349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:12,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:12,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:12,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71644206] [2022-01-18 15:16:12,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:12,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:12,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:12,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:12,435 INFO L87 Difference]: Start difference. First operand 394 states and 1223 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:12,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:12,701 INFO L93 Difference]: Finished difference Result 556 states and 1654 transitions. [2022-01-18 15:16:12,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:12,701 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:12,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:12,702 INFO L225 Difference]: With dead ends: 556 [2022-01-18 15:16:12,702 INFO L226 Difference]: Without dead ends: 556 [2022-01-18 15:16:12,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:12,702 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 123 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:12,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 232 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:12,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-18 15:16:12,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 401. [2022-01-18 15:16:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.105) internal successors, (1242), 400 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1242 transitions. [2022-01-18 15:16:12,707 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1242 transitions. Word has length 20 [2022-01-18 15:16:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:12,707 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1242 transitions. [2022-01-18 15:16:12,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1242 transitions. [2022-01-18 15:16:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:12,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:12,708 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:12,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-18 15:16:12,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 15:16:12,908 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:12,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:12,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1678642466, now seen corresponding path program 125 times [2022-01-18 15:16:12,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:12,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331979348] [2022-01-18 15:16:12,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:12,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:12,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:12,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331979348] [2022-01-18 15:16:12,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331979348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:12,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520418520] [2022-01-18 15:16:12,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:12,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:12,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:12,994 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:12,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 15:16:13,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:13,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:13,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:13,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:13,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:16:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:13,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:13,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:13,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:13,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520418520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:13,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:13,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:13,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176223792] [2022-01-18 15:16:13,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:13,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:13,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:13,397 INFO L87 Difference]: Start difference. First operand 401 states and 1242 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:13,652 INFO L93 Difference]: Finished difference Result 513 states and 1557 transitions. [2022-01-18 15:16:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:13,652 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:13,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:13,653 INFO L225 Difference]: With dead ends: 513 [2022-01-18 15:16:13,653 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 15:16:13,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:13,653 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:13,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 207 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 15:16:13,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 384. [2022-01-18 15:16:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.08355091383812) internal successors, (1181), 383 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1181 transitions. [2022-01-18 15:16:13,658 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1181 transitions. Word has length 20 [2022-01-18 15:16:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:13,658 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1181 transitions. [2022-01-18 15:16:13,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1181 transitions. [2022-01-18 15:16:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:13,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:13,659 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:13,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-18 15:16:13,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-18 15:16:13,861 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:13,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:13,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1257912026, now seen corresponding path program 126 times [2022-01-18 15:16:13,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:13,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075049775] [2022-01-18 15:16:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:13,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:13,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:13,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075049775] [2022-01-18 15:16:13,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075049775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:13,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073380663] [2022-01-18 15:16:13,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:13,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:13,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:13,941 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:13,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 15:16:14,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:16:14,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:14,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:14,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:14,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:16:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:14,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:14,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:14,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:14,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073380663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:14,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:14,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:14,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208423172] [2022-01-18 15:16:14,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:14,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:14,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:14,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:14,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:14,354 INFO L87 Difference]: Start difference. First operand 384 states and 1181 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:14,568 INFO L93 Difference]: Finished difference Result 466 states and 1399 transitions. [2022-01-18 15:16:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:14,568 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:14,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:14,569 INFO L225 Difference]: With dead ends: 466 [2022-01-18 15:16:14,569 INFO L226 Difference]: Without dead ends: 466 [2022-01-18 15:16:14,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:14,569 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:14,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 178 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:14,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-18 15:16:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 390. [2022-01-18 15:16:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1053984575835476) internal successors, (1208), 389 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1208 transitions. [2022-01-18 15:16:14,576 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1208 transitions. Word has length 20 [2022-01-18 15:16:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:14,576 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1208 transitions. [2022-01-18 15:16:14,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:14,576 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1208 transitions. [2022-01-18 15:16:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:14,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:14,577 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:14,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:14,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:14,778 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:14,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash 16242828, now seen corresponding path program 127 times [2022-01-18 15:16:14,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:14,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042519885] [2022-01-18 15:16:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:14,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:14,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:14,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042519885] [2022-01-18 15:16:14,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042519885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:14,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45041873] [2022-01-18 15:16:14,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:14,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:14,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:14,859 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:14,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 15:16:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:14,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:14,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:15,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:16:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:15,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:15,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:15,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:15,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45041873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:15,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:15,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:15,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664433317] [2022-01-18 15:16:15,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:15,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:15,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:15,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:15,274 INFO L87 Difference]: Start difference. First operand 390 states and 1208 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:15,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:15,490 INFO L93 Difference]: Finished difference Result 472 states and 1414 transitions. [2022-01-18 15:16:15,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:16:15,491 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:15,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:15,491 INFO L225 Difference]: With dead ends: 472 [2022-01-18 15:16:15,492 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 15:16:15,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:15,492 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:15,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 166 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 15:16:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 387. [2022-01-18 15:16:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.0906735751295336) internal successors, (1193), 386 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1193 transitions. [2022-01-18 15:16:15,496 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1193 transitions. Word has length 20 [2022-01-18 15:16:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:15,496 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1193 transitions. [2022-01-18 15:16:15,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1193 transitions. [2022-01-18 15:16:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:15,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:15,497 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:15,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:15,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:15,699 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash 18868604, now seen corresponding path program 128 times [2022-01-18 15:16:15,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:15,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854399868] [2022-01-18 15:16:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:15,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:15,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:15,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854399868] [2022-01-18 15:16:15,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854399868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:15,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146749040] [2022-01-18 15:16:15,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:15,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:15,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:15,812 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:15,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 15:16:15,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:15,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:15,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:16,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:16,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-01-18 15:16:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:16,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:16,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:16,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:16,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146749040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:16,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:16,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:16,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310653949] [2022-01-18 15:16:16,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:16,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:16,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:16,251 INFO L87 Difference]: Start difference. First operand 387 states and 1193 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:16,504 INFO L93 Difference]: Finished difference Result 430 states and 1307 transitions. [2022-01-18 15:16:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:16,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:16,505 INFO L225 Difference]: With dead ends: 430 [2022-01-18 15:16:16,505 INFO L226 Difference]: Without dead ends: 430 [2022-01-18 15:16:16,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:16,505 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:16,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 174 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-01-18 15:16:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 389. [2022-01-18 15:16:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.0927835051546393) internal successors, (1200), 388 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1200 transitions. [2022-01-18 15:16:16,509 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1200 transitions. Word has length 20 [2022-01-18 15:16:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:16,509 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1200 transitions. [2022-01-18 15:16:16,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1200 transitions. [2022-01-18 15:16:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:16,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:16,510 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:16,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:16,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-01-18 15:16:16,711 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:16,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:16,711 INFO L85 PathProgramCache]: Analyzing trace with hash 848874167, now seen corresponding path program 129 times [2022-01-18 15:16:16,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:16,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581002016] [2022-01-18 15:16:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:16,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:16,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581002016] [2022-01-18 15:16:16,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581002016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405584077] [2022-01-18 15:16:16,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:16,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:16,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:16,784 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:16,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 15:16:16,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:16:16,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:16,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:16,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:17,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:17,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:17,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:17,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405584077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:17,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:17,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 15:16:17,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936006585] [2022-01-18 15:16:17,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:17,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:16:17,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:17,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:16:17,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:16:17,186 INFO L87 Difference]: Start difference. First operand 389 states and 1200 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:17,432 INFO L93 Difference]: Finished difference Result 473 states and 1408 transitions. [2022-01-18 15:16:17,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:17,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:17,433 INFO L225 Difference]: With dead ends: 473 [2022-01-18 15:16:17,433 INFO L226 Difference]: Without dead ends: 401 [2022-01-18 15:16:17,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:17,433 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:17,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 157 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-18 15:16:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 379. [2022-01-18 15:16:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.0952380952380953) internal successors, (1170), 378 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1170 transitions. [2022-01-18 15:16:17,437 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1170 transitions. Word has length 20 [2022-01-18 15:16:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:17,437 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1170 transitions. [2022-01-18 15:16:17,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1170 transitions. [2022-01-18 15:16:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:17,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:17,438 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:17,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-01-18 15:16:17,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2022-01-18 15:16:17,643 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:17,643 INFO L85 PathProgramCache]: Analyzing trace with hash 291075782, now seen corresponding path program 130 times [2022-01-18 15:16:17,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:17,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408980083] [2022-01-18 15:16:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:17,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:17,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:17,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408980083] [2022-01-18 15:16:17,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408980083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:17,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543450481] [2022-01-18 15:16:17,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:17,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:17,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:17,736 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:17,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 15:16:17,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:17,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:17,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:17,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:17,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:16:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:18,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:18,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:18,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:18,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543450481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:18,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:18,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:18,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295345716] [2022-01-18 15:16:18,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:18,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:18,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:18,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:18,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:18,231 INFO L87 Difference]: Start difference. First operand 379 states and 1170 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:18,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:18,504 INFO L93 Difference]: Finished difference Result 594 states and 1707 transitions. [2022-01-18 15:16:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:18,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:18,505 INFO L225 Difference]: With dead ends: 594 [2022-01-18 15:16:18,505 INFO L226 Difference]: Without dead ends: 594 [2022-01-18 15:16:18,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:18,505 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 166 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:18,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 211 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:18,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-18 15:16:18,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 389. [2022-01-18 15:16:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.131443298969072) internal successors, (1215), 388 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1215 transitions. [2022-01-18 15:16:18,510 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1215 transitions. Word has length 20 [2022-01-18 15:16:18,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:18,510 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1215 transitions. [2022-01-18 15:16:18,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:18,511 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1215 transitions. [2022-01-18 15:16:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:18,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:18,511 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:18,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-01-18 15:16:18,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:18,712 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1173153216, now seen corresponding path program 131 times [2022-01-18 15:16:18,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:18,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566156112] [2022-01-18 15:16:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:18,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:18,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:18,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566156112] [2022-01-18 15:16:18,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566156112] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:18,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821305553] [2022-01-18 15:16:18,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:18,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:18,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:18,806 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:18,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 15:16:18,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:16:18,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:18,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:18,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:18,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:16:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:19,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:19,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:19,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:19,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821305553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:19,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:19,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:16:19,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170039933] [2022-01-18 15:16:19,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:19,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:19,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:19,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:19,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:19,245 INFO L87 Difference]: Start difference. First operand 389 states and 1215 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:19,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:19,467 INFO L93 Difference]: Finished difference Result 528 states and 1553 transitions. [2022-01-18 15:16:19,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:19,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:19,468 INFO L225 Difference]: With dead ends: 528 [2022-01-18 15:16:19,468 INFO L226 Difference]: Without dead ends: 522 [2022-01-18 15:16:19,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:19,468 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 130 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:19,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 169 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-18 15:16:19,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2022-01-18 15:16:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.112531969309463) internal successors, (1217), 391 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1217 transitions. [2022-01-18 15:16:19,473 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1217 transitions. Word has length 20 [2022-01-18 15:16:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:19,473 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1217 transitions. [2022-01-18 15:16:19,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1217 transitions. [2022-01-18 15:16:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:19,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:19,473 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:19,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:19,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:19,674 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:19,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:19,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1031973116, now seen corresponding path program 132 times [2022-01-18 15:16:19,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:19,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862927717] [2022-01-18 15:16:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:19,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:19,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:19,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862927717] [2022-01-18 15:16:19,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862927717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:19,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654622259] [2022-01-18 15:16:19,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:19,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:19,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:19,770 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:19,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 15:16:19,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:16:19,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:19,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:19,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:19,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:16:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:20,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:20,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:20,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:20,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654622259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:20,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:20,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:20,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447069991] [2022-01-18 15:16:20,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:20,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:20,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:20,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:20,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:20,259 INFO L87 Difference]: Start difference. First operand 392 states and 1217 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:20,599 INFO L93 Difference]: Finished difference Result 599 states and 1751 transitions. [2022-01-18 15:16:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:20,600 INFO L225 Difference]: With dead ends: 599 [2022-01-18 15:16:20,600 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 15:16:20,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:20,600 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 120 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:20,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 270 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:16:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 15:16:20,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 395. [2022-01-18 15:16:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.1269035532994924) internal successors, (1232), 394 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1232 transitions. [2022-01-18 15:16:20,605 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1232 transitions. Word has length 20 [2022-01-18 15:16:20,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:20,605 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1232 transitions. [2022-01-18 15:16:20,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1232 transitions. [2022-01-18 15:16:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:20,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:20,606 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:20,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 15:16:20,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-18 15:16:20,806 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:20,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:20,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2026348736, now seen corresponding path program 133 times [2022-01-18 15:16:20,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:20,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237086381] [2022-01-18 15:16:20,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:20,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:20,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237086381] [2022-01-18 15:16:20,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237086381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121856151] [2022-01-18 15:16:20,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:20,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:20,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:20,959 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:20,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 15:16:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:21,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:21,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:21,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:16:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:21,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:21,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:21,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:21,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121856151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:21,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:21,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:21,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27412955] [2022-01-18 15:16:21,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:21,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:21,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:21,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:21,434 INFO L87 Difference]: Start difference. First operand 395 states and 1232 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:21,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:21,762 INFO L93 Difference]: Finished difference Result 568 states and 1684 transitions. [2022-01-18 15:16:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:21,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:21,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:21,763 INFO L225 Difference]: With dead ends: 568 [2022-01-18 15:16:21,763 INFO L226 Difference]: Without dead ends: 568 [2022-01-18 15:16:21,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:21,764 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 105 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:21,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 257 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-18 15:16:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 392. [2022-01-18 15:16:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.112531969309463) internal successors, (1217), 391 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1217 transitions. [2022-01-18 15:16:21,768 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1217 transitions. Word has length 20 [2022-01-18 15:16:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:21,769 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1217 transitions. [2022-01-18 15:16:21,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1217 transitions. [2022-01-18 15:16:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:21,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:21,769 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:21,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-18 15:16:21,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 15:16:21,970 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1288165428, now seen corresponding path program 134 times [2022-01-18 15:16:21,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:21,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914321292] [2022-01-18 15:16:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:21,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:22,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:22,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914321292] [2022-01-18 15:16:22,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914321292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:22,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079908120] [2022-01-18 15:16:22,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:22,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:22,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:22,068 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:22,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 15:16:22,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:22,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:22,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:22,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:22,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:16:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:22,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:22,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:22,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:22,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079908120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:22,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:22,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:16:22,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108213455] [2022-01-18 15:16:22,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:22,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:22,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:22,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:22,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:22,525 INFO L87 Difference]: Start difference. First operand 392 states and 1217 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:22,828 INFO L93 Difference]: Finished difference Result 565 states and 1632 transitions. [2022-01-18 15:16:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:22,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:22,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:22,829 INFO L225 Difference]: With dead ends: 565 [2022-01-18 15:16:22,829 INFO L226 Difference]: Without dead ends: 559 [2022-01-18 15:16:22,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:22,829 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 110 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:22,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 228 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-18 15:16:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 396. [2022-01-18 15:16:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.116455696202532) internal successors, (1231), 395 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1231 transitions. [2022-01-18 15:16:22,834 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1231 transitions. Word has length 20 [2022-01-18 15:16:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:22,834 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1231 transitions. [2022-01-18 15:16:22,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:22,834 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1231 transitions. [2022-01-18 15:16:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:22,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:22,834 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:22,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-18 15:16:23,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 15:16:23,035 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:23,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1264265514, now seen corresponding path program 135 times [2022-01-18 15:16:23,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:23,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786643013] [2022-01-18 15:16:23,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:23,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:23,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:23,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786643013] [2022-01-18 15:16:23,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786643013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:23,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253408704] [2022-01-18 15:16:23,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:23,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:23,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:23,133 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:23,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 15:16:23,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:23,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:23,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:16:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:23,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:23,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:23,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:23,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253408704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:23,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:23,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:23,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251035612] [2022-01-18 15:16:23,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:23,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:23,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:23,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:23,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:23,605 INFO L87 Difference]: Start difference. First operand 396 states and 1231 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:23,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:23,952 INFO L93 Difference]: Finished difference Result 571 states and 1653 transitions. [2022-01-18 15:16:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:23,952 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:23,953 INFO L225 Difference]: With dead ends: 571 [2022-01-18 15:16:23,953 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 15:16:23,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:23,953 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 114 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:23,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 288 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 15:16:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 393. [2022-01-18 15:16:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.114795918367347) internal successors, (1221), 392 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1221 transitions. [2022-01-18 15:16:23,958 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1221 transitions. Word has length 20 [2022-01-18 15:16:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:23,958 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1221 transitions. [2022-01-18 15:16:23,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:23,958 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1221 transitions. [2022-01-18 15:16:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:23,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:23,959 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:23,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:24,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 15:16:24,159 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash -235484062, now seen corresponding path program 136 times [2022-01-18 15:16:24,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:24,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072228884] [2022-01-18 15:16:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:24,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:24,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:24,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072228884] [2022-01-18 15:16:24,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072228884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:24,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416915801] [2022-01-18 15:16:24,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:24,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:24,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:24,256 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:24,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 15:16:24,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:24,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:24,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:24,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:24,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-01-18 15:16:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:24,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:24,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:24,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:24,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416915801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:24,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:24,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:24,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139819230] [2022-01-18 15:16:24,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:24,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:24,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:24,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:24,732 INFO L87 Difference]: Start difference. First operand 393 states and 1221 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:24,968 INFO L93 Difference]: Finished difference Result 504 states and 1510 transitions. [2022-01-18 15:16:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:24,968 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:24,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:24,969 INFO L225 Difference]: With dead ends: 504 [2022-01-18 15:16:24,969 INFO L226 Difference]: Without dead ends: 504 [2022-01-18 15:16:24,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:24,970 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 115 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:24,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 169 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-18 15:16:24,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 394. [2022-01-18 15:16:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.1119592875318065) internal successors, (1223), 393 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1223 transitions. [2022-01-18 15:16:24,974 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1223 transitions. Word has length 20 [2022-01-18 15:16:24,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:24,974 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1223 transitions. [2022-01-18 15:16:24,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1223 transitions. [2022-01-18 15:16:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:24,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:24,975 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:24,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:25,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:25,175 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash 758891558, now seen corresponding path program 137 times [2022-01-18 15:16:25,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:25,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512083333] [2022-01-18 15:16:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:25,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:25,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:25,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512083333] [2022-01-18 15:16:25,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512083333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:25,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952663420] [2022-01-18 15:16:25,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:25,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:25,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:25,267 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:25,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 15:16:25,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:25,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:25,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:25,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:25,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-01-18 15:16:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:25,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:25,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:25,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:25,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952663420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:25,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:25,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:25,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899236436] [2022-01-18 15:16:25,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:25,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:25,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:25,770 INFO L87 Difference]: Start difference. First operand 394 states and 1223 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:26,068 INFO L93 Difference]: Finished difference Result 498 states and 1492 transitions. [2022-01-18 15:16:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:16:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:26,069 INFO L225 Difference]: With dead ends: 498 [2022-01-18 15:16:26,069 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 15:16:26,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:26,071 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:26,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 217 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 15:16:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 383. [2022-01-18 15:16:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.1047120418848166) internal successors, (1186), 382 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1186 transitions. [2022-01-18 15:16:26,075 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1186 transitions. Word has length 20 [2022-01-18 15:16:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:26,075 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1186 transitions. [2022-01-18 15:16:26,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1186 transitions. [2022-01-18 15:16:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:26,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:26,076 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:26,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:26,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-01-18 15:16:26,276 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash 463464376, now seen corresponding path program 138 times [2022-01-18 15:16:26,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:26,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459022035] [2022-01-18 15:16:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:26,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:26,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459022035] [2022-01-18 15:16:26,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459022035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502819858] [2022-01-18 15:16:26,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:26,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:26,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:26,371 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:26,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 15:16:26,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:16:26,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:26,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:26,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:26,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:26,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:26,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:26,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502819858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:26,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:26,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:26,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808197557] [2022-01-18 15:16:26,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:26,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:26,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:26,838 INFO L87 Difference]: Start difference. First operand 383 states and 1186 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:27,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:27,075 INFO L93 Difference]: Finished difference Result 459 states and 1385 transitions. [2022-01-18 15:16:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:27,076 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:27,076 INFO L225 Difference]: With dead ends: 459 [2022-01-18 15:16:27,076 INFO L226 Difference]: Without dead ends: 459 [2022-01-18 15:16:27,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:27,077 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:27,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 172 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-18 15:16:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 380. [2022-01-18 15:16:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.0976253298153034) internal successors, (1174), 379 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1174 transitions. [2022-01-18 15:16:27,081 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1174 transitions. Word has length 20 [2022-01-18 15:16:27,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:27,081 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1174 transitions. [2022-01-18 15:16:27,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:27,081 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1174 transitions. [2022-01-18 15:16:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:27,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:27,081 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:27,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-01-18 15:16:27,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 15:16:27,282 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash -373083940, now seen corresponding path program 139 times [2022-01-18 15:16:27,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:27,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145019055] [2022-01-18 15:16:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:27,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:27,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:27,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145019055] [2022-01-18 15:16:27,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145019055] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:27,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621539589] [2022-01-18 15:16:27,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:27,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:27,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:27,357 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:27,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 15:16:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:27,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:27,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:27,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:27,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:27,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:27,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:27,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621539589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:27,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:27,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:16:27,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508330702] [2022-01-18 15:16:27,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:27,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:27,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:27,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:27,786 INFO L87 Difference]: Start difference. First operand 380 states and 1174 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:28,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:28,006 INFO L93 Difference]: Finished difference Result 466 states and 1375 transitions. [2022-01-18 15:16:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:28,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:28,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:28,007 INFO L225 Difference]: With dead ends: 466 [2022-01-18 15:16:28,007 INFO L226 Difference]: Without dead ends: 460 [2022-01-18 15:16:28,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:28,008 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 92 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:28,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 168 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-01-18 15:16:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 394. [2022-01-18 15:16:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0865139949109417) internal successors, (1213), 393 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1213 transitions. [2022-01-18 15:16:28,012 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1213 transitions. Word has length 20 [2022-01-18 15:16:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:28,012 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1213 transitions. [2022-01-18 15:16:28,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1213 transitions. [2022-01-18 15:16:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:28,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:28,013 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:28,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:28,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:28,213 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:28,214 INFO L85 PathProgramCache]: Analyzing trace with hash -349184026, now seen corresponding path program 140 times [2022-01-18 15:16:28,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:28,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589614862] [2022-01-18 15:16:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:28,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:28,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:28,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589614862] [2022-01-18 15:16:28,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589614862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:28,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285661901] [2022-01-18 15:16:28,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:28,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:28,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:28,317 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:28,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 15:16:28,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:28,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:28,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:28,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:28,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:28,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:28,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:28,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:28,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285661901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:28,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:28,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:28,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853614920] [2022-01-18 15:16:28,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:28,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:28,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:28,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:28,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:28,762 INFO L87 Difference]: Start difference. First operand 394 states and 1213 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:29,029 INFO L93 Difference]: Finished difference Result 472 states and 1396 transitions. [2022-01-18 15:16:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:16:29,029 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:29,030 INFO L225 Difference]: With dead ends: 472 [2022-01-18 15:16:29,030 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 15:16:29,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:29,030 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:29,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 229 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 15:16:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 392. [2022-01-18 15:16:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0895140664961636) internal successors, (1208), 391 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1208 transitions. [2022-01-18 15:16:29,035 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1208 transitions. Word has length 20 [2022-01-18 15:16:29,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:29,035 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1208 transitions. [2022-01-18 15:16:29,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1208 transitions. [2022-01-18 15:16:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:29,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:29,035 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:29,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:29,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:29,236 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:29,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:29,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1133950912, now seen corresponding path program 141 times [2022-01-18 15:16:29,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:29,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297677695] [2022-01-18 15:16:29,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:29,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:29,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:29,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297677695] [2022-01-18 15:16:29,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297677695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:29,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244533063] [2022-01-18 15:16:29,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:29,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:29,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:29,318 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:29,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 15:16:29,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:29,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:29,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:29,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:29,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:29,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:29,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:29,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244533063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:29,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:29,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:29,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961926331] [2022-01-18 15:16:29,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:29,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:29,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:29,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:29,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:29,740 INFO L87 Difference]: Start difference. First operand 392 states and 1208 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:29,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:29,986 INFO L93 Difference]: Finished difference Result 441 states and 1331 transitions. [2022-01-18 15:16:29,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:29,987 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:29,987 INFO L225 Difference]: With dead ends: 441 [2022-01-18 15:16:29,987 INFO L226 Difference]: Without dead ends: 441 [2022-01-18 15:16:29,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:29,988 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:29,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 180 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-01-18 15:16:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 382. [2022-01-18 15:16:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.094488188976378) internal successors, (1179), 381 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1179 transitions. [2022-01-18 15:16:29,992 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1179 transitions. Word has length 20 [2022-01-18 15:16:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:29,992 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1179 transitions. [2022-01-18 15:16:29,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1179 transitions. [2022-01-18 15:16:29,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:29,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:29,992 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:30,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-18 15:16:30,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:30,193 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:30,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:30,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1178925768, now seen corresponding path program 142 times [2022-01-18 15:16:30,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:30,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993826245] [2022-01-18 15:16:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:30,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:30,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:30,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993826245] [2022-01-18 15:16:30,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993826245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:30,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785989366] [2022-01-18 15:16:30,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:30,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:30,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:30,290 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:30,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 15:16:30,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:30,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:30,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:30,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:30,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:16:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:30,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:30,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:30,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:30,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785989366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:30,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:30,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:30,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161615530] [2022-01-18 15:16:30,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:30,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:30,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:30,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:30,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:30,958 INFO L87 Difference]: Start difference. First operand 382 states and 1179 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:31,318 INFO L93 Difference]: Finished difference Result 461 states and 1376 transitions. [2022-01-18 15:16:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:31,318 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:31,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:31,319 INFO L225 Difference]: With dead ends: 461 [2022-01-18 15:16:31,319 INFO L226 Difference]: Without dead ends: 461 [2022-01-18 15:16:31,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:31,319 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 59 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:31,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 165 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-18 15:16:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 390. [2022-01-18 15:16:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1105398457583546) internal successors, (1210), 389 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1210 transitions. [2022-01-18 15:16:31,323 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1210 transitions. Word has length 20 [2022-01-18 15:16:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:31,323 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1210 transitions. [2022-01-18 15:16:31,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1210 transitions. [2022-01-18 15:16:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:31,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:31,324 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:31,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 15:16:31,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-01-18 15:16:31,525 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:31,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:31,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2061003202, now seen corresponding path program 143 times [2022-01-18 15:16:31,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:31,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556830050] [2022-01-18 15:16:31,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:31,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:31,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:31,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556830050] [2022-01-18 15:16:31,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556830050] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:31,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526125160] [2022-01-18 15:16:31,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:31,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:31,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:31,617 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:31,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 15:16:31,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:31,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:31,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:31,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:31,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:16:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:31,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:32,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:32,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:32,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526125160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:32,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:32,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:16:32,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257240229] [2022-01-18 15:16:32,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:32,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:32,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:32,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:32,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:32,204 INFO L87 Difference]: Start difference. First operand 390 states and 1210 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:32,535 INFO L93 Difference]: Finished difference Result 467 states and 1383 transitions. [2022-01-18 15:16:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:16:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:32,536 INFO L225 Difference]: With dead ends: 467 [2022-01-18 15:16:32,536 INFO L226 Difference]: Without dead ends: 461 [2022-01-18 15:16:32,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:32,536 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:32,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 167 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-18 15:16:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 387. [2022-01-18 15:16:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.106217616580311) internal successors, (1199), 386 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1199 transitions. [2022-01-18 15:16:32,541 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1199 transitions. Word has length 20 [2022-01-18 15:16:32,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:32,541 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1199 transitions. [2022-01-18 15:16:32,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:32,541 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1199 transitions. [2022-01-18 15:16:32,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:32,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:32,541 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:32,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 15:16:32,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 15:16:32,742 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:32,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1525773400, now seen corresponding path program 144 times [2022-01-18 15:16:32,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:32,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238430473] [2022-01-18 15:16:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:32,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:32,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238430473] [2022-01-18 15:16:32,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238430473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968983334] [2022-01-18 15:16:32,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:32,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:32,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:32,808 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:32,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 15:16:32,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:16:32,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:32,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:32,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:33,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:33,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:33,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:33,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:33,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968983334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:33,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:33,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:16:33,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558552534] [2022-01-18 15:16:33,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:33,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:16:33,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:16:33,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:16:33,345 INFO L87 Difference]: Start difference. First operand 387 states and 1199 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:33,592 INFO L93 Difference]: Finished difference Result 431 states and 1301 transitions. [2022-01-18 15:16:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:33,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:33,593 INFO L225 Difference]: With dead ends: 431 [2022-01-18 15:16:33,593 INFO L226 Difference]: Without dead ends: 419 [2022-01-18 15:16:33,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:33,594 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:33,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 111 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:16:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-01-18 15:16:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 384. [2022-01-18 15:16:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.101827676240209) internal successors, (1188), 383 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1188 transitions. [2022-01-18 15:16:33,598 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1188 transitions. Word has length 20 [2022-01-18 15:16:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:33,598 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1188 transitions. [2022-01-18 15:16:33,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1188 transitions. [2022-01-18 15:16:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:33,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:33,598 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:33,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:33,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 15:16:33,811 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:33,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1623060654, now seen corresponding path program 145 times [2022-01-18 15:16:33,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:33,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450539407] [2022-01-18 15:16:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:33,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:33,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:33,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450539407] [2022-01-18 15:16:33,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450539407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:33,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129750517] [2022-01-18 15:16:33,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:33,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:33,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:33,913 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:33,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 15:16:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:34,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:34,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:34,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:16:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:34,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:34,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:34,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:34,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129750517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:34,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:34,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:34,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132713334] [2022-01-18 15:16:34,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:34,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:34,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:34,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:34,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:34,516 INFO L87 Difference]: Start difference. First operand 384 states and 1188 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:34,861 INFO L93 Difference]: Finished difference Result 548 states and 1594 transitions. [2022-01-18 15:16:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:34,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:34,862 INFO L225 Difference]: With dead ends: 548 [2022-01-18 15:16:34,862 INFO L226 Difference]: Without dead ends: 548 [2022-01-18 15:16:34,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:34,862 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 130 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:34,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 175 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:34,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-18 15:16:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 392. [2022-01-18 15:16:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.130434782608696) internal successors, (1224), 391 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1224 transitions. [2022-01-18 15:16:34,867 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1224 transitions. Word has length 20 [2022-01-18 15:16:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:34,867 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1224 transitions. [2022-01-18 15:16:34,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1224 transitions. [2022-01-18 15:16:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:34,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:34,868 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:34,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-01-18 15:16:35,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:35,068 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:35,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash -740983220, now seen corresponding path program 146 times [2022-01-18 15:16:35,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:35,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195202672] [2022-01-18 15:16:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:35,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:35,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:35,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195202672] [2022-01-18 15:16:35,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195202672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:35,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38812981] [2022-01-18 15:16:35,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:35,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:35,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:35,173 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:35,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 15:16:35,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:35,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:35,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:35,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:35,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 73 [2022-01-18 15:16:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:35,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:35,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:35,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:35,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38812981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:35,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:35,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:16:35,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937695558] [2022-01-18 15:16:35,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:35,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:35,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:35,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:35,797 INFO L87 Difference]: Start difference. First operand 392 states and 1224 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:36,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:36,228 INFO L93 Difference]: Finished difference Result 577 states and 1640 transitions. [2022-01-18 15:16:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:16:36,229 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:36,229 INFO L225 Difference]: With dead ends: 577 [2022-01-18 15:16:36,229 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 15:16:36,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:16:36,230 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 125 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:36,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 250 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 15:16:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 395. [2022-01-18 15:16:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.1116751269035534) internal successors, (1226), 394 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1226 transitions. [2022-01-18 15:16:36,235 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1226 transitions. Word has length 20 [2022-01-18 15:16:36,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:36,235 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1226 transitions. [2022-01-18 15:16:36,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1226 transitions. [2022-01-18 15:16:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:36,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:36,235 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:36,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:36,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 15:16:36,436 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:36,436 INFO L85 PathProgramCache]: Analyzing trace with hash -882163320, now seen corresponding path program 147 times [2022-01-18 15:16:36,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:36,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007025029] [2022-01-18 15:16:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:36,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:36,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:36,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007025029] [2022-01-18 15:16:36,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007025029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:36,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654292834] [2022-01-18 15:16:36,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:36,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:36,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:36,543 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:36,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 15:16:36,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:36,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:36,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:36,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:36,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:16:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:36,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:37,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:37,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:37,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654292834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:37,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:37,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:37,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437996614] [2022-01-18 15:16:37,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:37,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:37,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:37,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:37,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:37,188 INFO L87 Difference]: Start difference. First operand 395 states and 1226 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:37,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:37,545 INFO L93 Difference]: Finished difference Result 545 states and 1581 transitions. [2022-01-18 15:16:37,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:37,545 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:37,546 INFO L225 Difference]: With dead ends: 545 [2022-01-18 15:16:37,546 INFO L226 Difference]: Without dead ends: 545 [2022-01-18 15:16:37,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:37,546 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 158 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:37,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 193 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-18 15:16:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 388. [2022-01-18 15:16:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1214470284237725) internal successors, (1208), 387 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1208 transitions. [2022-01-18 15:16:37,551 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1208 transitions. Word has length 20 [2022-01-18 15:16:37,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:37,551 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1208 transitions. [2022-01-18 15:16:37,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:37,551 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1208 transitions. [2022-01-18 15:16:37,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:37,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:37,552 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:37,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-01-18 15:16:37,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-01-18 15:16:37,752 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:37,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:37,752 INFO L85 PathProgramCache]: Analyzing trace with hash 112212300, now seen corresponding path program 148 times [2022-01-18 15:16:37,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:37,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657071452] [2022-01-18 15:16:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:37,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:37,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:37,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657071452] [2022-01-18 15:16:37,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657071452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:37,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818182255] [2022-01-18 15:16:37,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:37,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:37,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:37,863 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:37,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 15:16:37,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:37,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:37,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:37,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:38,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:16:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:38,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:38,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:38,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:38,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818182255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:38,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:38,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:38,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465798975] [2022-01-18 15:16:38,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:38,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:38,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:38,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:38,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:38,467 INFO L87 Difference]: Start difference. First operand 388 states and 1208 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:38,800 INFO L93 Difference]: Finished difference Result 512 states and 1504 transitions. [2022-01-18 15:16:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:16:38,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:38,801 INFO L225 Difference]: With dead ends: 512 [2022-01-18 15:16:38,801 INFO L226 Difference]: Without dead ends: 512 [2022-01-18 15:16:38,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:38,801 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:38,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 209 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:38,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-18 15:16:38,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 385. [2022-01-18 15:16:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.1067708333333335) internal successors, (1193), 384 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1193 transitions. [2022-01-18 15:16:38,805 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1193 transitions. Word has length 20 [2022-01-18 15:16:38,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:38,805 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1193 transitions. [2022-01-18 15:16:38,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1193 transitions. [2022-01-18 15:16:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:38,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:38,806 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:38,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-01-18 15:16:39,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:39,006 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:39,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1092665432, now seen corresponding path program 149 times [2022-01-18 15:16:39,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:39,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974921223] [2022-01-18 15:16:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:39,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:39,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:39,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974921223] [2022-01-18 15:16:39,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974921223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:39,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782404076] [2022-01-18 15:16:39,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:39,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:39,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:39,112 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:39,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 15:16:39,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:39,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:39,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:39,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:39,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:16:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:39,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:39,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:39,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:39,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782404076] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:39,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:39,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:16:39,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372889571] [2022-01-18 15:16:39,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:39,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:39,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:39,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:39,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:39,688 INFO L87 Difference]: Start difference. First operand 385 states and 1193 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:40,140 INFO L93 Difference]: Finished difference Result 522 states and 1522 transitions. [2022-01-18 15:16:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:16:40,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:40,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:40,141 INFO L225 Difference]: With dead ends: 522 [2022-01-18 15:16:40,141 INFO L226 Difference]: Without dead ends: 516 [2022-01-18 15:16:40,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:16:40,142 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 138 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:40,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 203 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-01-18 15:16:40,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 395. [2022-01-18 15:16:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0964467005076144) internal successors, (1220), 394 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1220 transitions. [2022-01-18 15:16:40,146 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1220 transitions. Word has length 20 [2022-01-18 15:16:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:40,146 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1220 transitions. [2022-01-18 15:16:40,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:40,146 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1220 transitions. [2022-01-18 15:16:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:40,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:40,147 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:40,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-01-18 15:16:40,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-01-18 15:16:40,351 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:40,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:40,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1116565346, now seen corresponding path program 150 times [2022-01-18 15:16:40,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:40,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20386219] [2022-01-18 15:16:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:40,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:40,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:40,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20386219] [2022-01-18 15:16:40,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20386219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:40,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069275631] [2022-01-18 15:16:40,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:40,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:40,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:40,457 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:40,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 15:16:40,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:16:40,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:40,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:40,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:40,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:16:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:40,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:40,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:40,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:41,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069275631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:41,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:41,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:41,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542616590] [2022-01-18 15:16:41,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:41,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:41,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:41,078 INFO L87 Difference]: Start difference. First operand 395 states and 1220 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:41,454 INFO L93 Difference]: Finished difference Result 493 states and 1468 transitions. [2022-01-18 15:16:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:41,455 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:41,455 INFO L225 Difference]: With dead ends: 493 [2022-01-18 15:16:41,455 INFO L226 Difference]: Without dead ends: 493 [2022-01-18 15:16:41,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:41,456 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 73 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:41,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 188 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:41,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-18 15:16:41,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 384. [2022-01-18 15:16:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.101827676240209) internal successors, (1188), 383 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1188 transitions. [2022-01-18 15:16:41,460 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1188 transitions. Word has length 20 [2022-01-18 15:16:41,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:41,460 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1188 transitions. [2022-01-18 15:16:41,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1188 transitions. [2022-01-18 15:16:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:41,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:41,461 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:41,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:41,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:41,661 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:41,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1760660532, now seen corresponding path program 151 times [2022-01-18 15:16:41,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:41,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543475842] [2022-01-18 15:16:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:41,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:41,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:41,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543475842] [2022-01-18 15:16:41,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543475842] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:41,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348867866] [2022-01-18 15:16:41,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:41,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:41,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:41,728 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:41,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 15:16:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:41,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:41,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:42,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:42,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:42,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:42,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:42,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348867866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:42,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:42,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:16:42,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125350255] [2022-01-18 15:16:42,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:42,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:16:42,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:42,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:16:42,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:16:42,262 INFO L87 Difference]: Start difference. First operand 384 states and 1188 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:42,510 INFO L93 Difference]: Finished difference Result 433 states and 1305 transitions. [2022-01-18 15:16:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:42,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:42,511 INFO L225 Difference]: With dead ends: 433 [2022-01-18 15:16:42,511 INFO L226 Difference]: Without dead ends: 421 [2022-01-18 15:16:42,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:42,511 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:42,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 111 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:16:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-01-18 15:16:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 386. [2022-01-18 15:16:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.0987012987012985) internal successors, (1193), 385 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1193 transitions. [2022-01-18 15:16:42,515 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1193 transitions. Word has length 20 [2022-01-18 15:16:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:42,515 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1193 transitions. [2022-01-18 15:16:42,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1193 transitions. [2022-01-18 15:16:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:42,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:42,516 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:42,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-01-18 15:16:42,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:42,719 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:42,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:42,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1019763198, now seen corresponding path program 152 times [2022-01-18 15:16:42,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:42,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114526056] [2022-01-18 15:16:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:42,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:42,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:42,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114526056] [2022-01-18 15:16:42,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114526056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:42,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011003565] [2022-01-18 15:16:42,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:42,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:42,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:42,815 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:42,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 15:16:42,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:42,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:42,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:42,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:43,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:16:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:43,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:43,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:43,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:43,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011003565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:43,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:43,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:16:43,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811482474] [2022-01-18 15:16:43,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:43,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:43,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:43,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:43,452 INFO L87 Difference]: Start difference. First operand 386 states and 1193 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:43,840 INFO L93 Difference]: Finished difference Result 458 states and 1357 transitions. [2022-01-18 15:16:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:43,841 INFO L225 Difference]: With dead ends: 458 [2022-01-18 15:16:43,841 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 15:16:43,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:43,842 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:43,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 186 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 15:16:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 396. [2022-01-18 15:16:43,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.088607594936709) internal successors, (1220), 395 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1220 transitions. [2022-01-18 15:16:43,847 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1220 transitions. Word has length 20 [2022-01-18 15:16:43,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:43,847 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1220 transitions. [2022-01-18 15:16:43,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:43,847 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1220 transitions. [2022-01-18 15:16:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:43,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:43,848 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:43,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-01-18 15:16:44,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:44,049 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash -995863284, now seen corresponding path program 153 times [2022-01-18 15:16:44,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:44,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2421133] [2022-01-18 15:16:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:44,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:44,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:44,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2421133] [2022-01-18 15:16:44,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2421133] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:44,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200426104] [2022-01-18 15:16:44,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:44,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:44,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:44,120 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:44,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 15:16:44,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:44,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:44,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:44,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:44,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:16:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:44,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:44,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:44,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:44,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200426104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:44,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:44,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:16:44,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207623468] [2022-01-18 15:16:44,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:44,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:16:44,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:44,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:16:44,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:16:44,676 INFO L87 Difference]: Start difference. First operand 396 states and 1220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:44,883 INFO L93 Difference]: Finished difference Result 429 states and 1303 transitions. [2022-01-18 15:16:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:44,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:44,883 INFO L225 Difference]: With dead ends: 429 [2022-01-18 15:16:44,883 INFO L226 Difference]: Without dead ends: 429 [2022-01-18 15:16:44,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:44,884 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:44,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 83 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:16:44,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-18 15:16:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 383. [2022-01-18 15:16:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.0968586387434556) internal successors, (1183), 382 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1183 transitions. [2022-01-18 15:16:44,888 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1183 transitions. Word has length 20 [2022-01-18 15:16:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:44,888 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1183 transitions. [2022-01-18 15:16:44,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:44,888 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1183 transitions. [2022-01-18 15:16:44,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:44,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:44,888 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:44,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-01-18 15:16:45,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:45,089 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2035439788, now seen corresponding path program 154 times [2022-01-18 15:16:45,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:45,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87249369] [2022-01-18 15:16:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:45,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:45,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:45,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87249369] [2022-01-18 15:16:45,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87249369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:45,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941836880] [2022-01-18 15:16:45,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:45,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:45,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:45,208 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:45,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 15:16:45,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:45,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:45,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:45,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:45,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:16:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:45,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:45,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:45,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:45,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941836880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:45,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:45,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:45,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626048680] [2022-01-18 15:16:45,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:45,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:45,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:45,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:45,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:45,774 INFO L87 Difference]: Start difference. First operand 383 states and 1183 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:46,012 INFO L93 Difference]: Finished difference Result 506 states and 1505 transitions. [2022-01-18 15:16:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:46,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:46,013 INFO L225 Difference]: With dead ends: 506 [2022-01-18 15:16:46,013 INFO L226 Difference]: Without dead ends: 506 [2022-01-18 15:16:46,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:46,013 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 129 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:46,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 185 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:46,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-18 15:16:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 393. [2022-01-18 15:16:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.13265306122449) internal successors, (1228), 392 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1228 transitions. [2022-01-18 15:16:46,022 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1228 transitions. Word has length 20 [2022-01-18 15:16:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:46,022 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1228 transitions. [2022-01-18 15:16:46,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1228 transitions. [2022-01-18 15:16:46,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:46,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:46,023 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:46,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-01-18 15:16:46,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:46,223 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:46,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1377450074, now seen corresponding path program 155 times [2022-01-18 15:16:46,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:46,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965040407] [2022-01-18 15:16:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:46,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:46,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:46,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965040407] [2022-01-18 15:16:46,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965040407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:46,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313959137] [2022-01-18 15:16:46,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:46,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:46,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:46,317 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:46,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 15:16:46,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:16:46,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:46,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:46,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:46,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:16:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:46,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:46,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:46,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:46,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313959137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:46,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:46,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:16:46,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483846861] [2022-01-18 15:16:46,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:46,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:46,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:46,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:46,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:46,841 INFO L87 Difference]: Start difference. First operand 393 states and 1228 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:47,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:47,075 INFO L93 Difference]: Finished difference Result 535 states and 1551 transitions. [2022-01-18 15:16:47,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:16:47,075 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:47,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:47,076 INFO L225 Difference]: With dead ends: 535 [2022-01-18 15:16:47,076 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 15:16:47,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:47,076 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:47,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 166 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:47,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 15:16:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 396. [2022-01-18 15:16:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.1139240506329116) internal successors, (1230), 395 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1230 transitions. [2022-01-18 15:16:47,081 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1230 transitions. Word has length 20 [2022-01-18 15:16:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:47,081 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1230 transitions. [2022-01-18 15:16:47,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1230 transitions. [2022-01-18 15:16:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:47,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:47,082 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:47,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-01-18 15:16:47,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-01-18 15:16:47,282 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:47,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:47,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1518630174, now seen corresponding path program 156 times [2022-01-18 15:16:47,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:47,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051233398] [2022-01-18 15:16:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:47,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:47,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:47,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051233398] [2022-01-18 15:16:47,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051233398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:47,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407639505] [2022-01-18 15:16:47,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:47,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:47,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:47,385 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:47,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 15:16:47,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:16:47,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:47,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:47,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:47,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:16:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:47,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:47,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:47,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:47,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407639505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:47,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:47,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:47,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671700439] [2022-01-18 15:16:47,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:47,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:47,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:47,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:47,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:47,939 INFO L87 Difference]: Start difference. First operand 396 states and 1230 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:48,259 INFO L93 Difference]: Finished difference Result 564 states and 1648 transitions. [2022-01-18 15:16:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:48,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:48,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:48,260 INFO L225 Difference]: With dead ends: 564 [2022-01-18 15:16:48,260 INFO L226 Difference]: Without dead ends: 564 [2022-01-18 15:16:48,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:48,261 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 133 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:48,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 228 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:48,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-18 15:16:48,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 399. [2022-01-18 15:16:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.128140703517588) internal successors, (1245), 398 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:48,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1245 transitions. [2022-01-18 15:16:48,266 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1245 transitions. Word has length 20 [2022-01-18 15:16:48,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:48,266 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1245 transitions. [2022-01-18 15:16:48,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1245 transitions. [2022-01-18 15:16:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:48,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:48,267 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:48,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-01-18 15:16:48,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 15:16:48,482 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:48,483 INFO L85 PathProgramCache]: Analyzing trace with hash -524254554, now seen corresponding path program 157 times [2022-01-18 15:16:48,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:48,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341609056] [2022-01-18 15:16:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:48,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:48,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:48,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341609056] [2022-01-18 15:16:48,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341609056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:48,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323779855] [2022-01-18 15:16:48,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:48,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:48,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:48,595 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:48,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 15:16:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:48,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:48,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:48,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:16:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:48,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:49,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:49,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:49,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323779855] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:49,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:49,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:49,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228196162] [2022-01-18 15:16:49,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:49,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:49,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:49,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:49,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:49,160 INFO L87 Difference]: Start difference. First operand 399 states and 1245 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:49,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:49,515 INFO L93 Difference]: Finished difference Result 560 states and 1637 transitions. [2022-01-18 15:16:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:49,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:49,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:49,516 INFO L225 Difference]: With dead ends: 560 [2022-01-18 15:16:49,516 INFO L226 Difference]: Without dead ends: 560 [2022-01-18 15:16:49,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:49,517 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 124 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:49,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 276 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-01-18 15:16:49,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 396. [2022-01-18 15:16:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.1139240506329116) internal successors, (1230), 395 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1230 transitions. [2022-01-18 15:16:49,528 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1230 transitions. Word has length 20 [2022-01-18 15:16:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:49,529 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1230 transitions. [2022-01-18 15:16:49,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1230 transitions. [2022-01-18 15:16:49,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:49,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:49,529 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:49,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-01-18 15:16:49,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-18 15:16:49,745 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:49,746 INFO L85 PathProgramCache]: Analyzing trace with hash 456198578, now seen corresponding path program 158 times [2022-01-18 15:16:49,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:49,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572644657] [2022-01-18 15:16:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:49,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:49,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:49,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572644657] [2022-01-18 15:16:49,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572644657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:49,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909191619] [2022-01-18 15:16:49,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:49,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:49,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:49,840 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:49,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 15:16:49,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:49,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:49,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:49,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:50,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:16:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:50,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:50,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:50,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:50,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909191619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:50,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:50,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:16:50,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610785962] [2022-01-18 15:16:50,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:50,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:50,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:50,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:50,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:50,349 INFO L87 Difference]: Start difference. First operand 396 states and 1230 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:50,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:50,625 INFO L93 Difference]: Finished difference Result 552 states and 1600 transitions. [2022-01-18 15:16:50,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:50,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:50,627 INFO L225 Difference]: With dead ends: 552 [2022-01-18 15:16:50,627 INFO L226 Difference]: Without dead ends: 546 [2022-01-18 15:16:50,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:50,627 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 117 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:50,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 175 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:50,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-18 15:16:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 400. [2022-01-18 15:16:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.117794486215539) internal successors, (1244), 399 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1244 transitions. [2022-01-18 15:16:50,632 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1244 transitions. Word has length 20 [2022-01-18 15:16:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:50,632 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1244 transitions. [2022-01-18 15:16:50,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:50,632 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1244 transitions. [2022-01-18 15:16:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:50,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:50,633 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:50,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:50,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:50,833 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:50,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:50,833 INFO L85 PathProgramCache]: Analyzing trace with hash 480098492, now seen corresponding path program 159 times [2022-01-18 15:16:50,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:50,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260746874] [2022-01-18 15:16:50,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:50,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:50,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:50,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260746874] [2022-01-18 15:16:50,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260746874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:50,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790580546] [2022-01-18 15:16:50,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:50,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:50,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:50,951 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:50,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 15:16:51,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:51,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:51,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:51,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:51,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:16:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:51,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:51,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:51,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:51,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790580546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:51,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:51,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:51,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283308388] [2022-01-18 15:16:51,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:51,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:51,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:51,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:51,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:51,497 INFO L87 Difference]: Start difference. First operand 400 states and 1244 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:51,791 INFO L93 Difference]: Finished difference Result 535 states and 1582 transitions. [2022-01-18 15:16:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:51,792 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:51,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:51,792 INFO L225 Difference]: With dead ends: 535 [2022-01-18 15:16:51,792 INFO L226 Difference]: Without dead ends: 535 [2022-01-18 15:16:51,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:51,793 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 101 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:51,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 226 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-18 15:16:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 397. [2022-01-18 15:16:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.1161616161616164) internal successors, (1234), 396 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1234 transitions. [2022-01-18 15:16:51,797 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1234 transitions. Word has length 20 [2022-01-18 15:16:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:51,798 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1234 transitions. [2022-01-18 15:16:51,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1234 transitions. [2022-01-18 15:16:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:51,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:51,798 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:51,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:51,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:51,999 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:51,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1508879944, now seen corresponding path program 160 times [2022-01-18 15:16:51,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:51,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366133900] [2022-01-18 15:16:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:51,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:52,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366133900] [2022-01-18 15:16:52,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366133900] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738778275] [2022-01-18 15:16:52,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:52,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:52,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:52,094 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:52,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 15:16:52,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:52,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:52,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:52,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:52,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-01-18 15:16:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:52,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:52,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:52,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:52,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738778275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:52,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:52,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:52,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312690929] [2022-01-18 15:16:52,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:52,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:52,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:52,656 INFO L87 Difference]: Start difference. First operand 397 states and 1234 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:52,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:52,884 INFO L93 Difference]: Finished difference Result 488 states and 1466 transitions. [2022-01-18 15:16:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:52,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:52,885 INFO L225 Difference]: With dead ends: 488 [2022-01-18 15:16:52,885 INFO L226 Difference]: Without dead ends: 488 [2022-01-18 15:16:52,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:52,885 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 83 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:52,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 175 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-18 15:16:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 398. [2022-01-18 15:16:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.1133501259445846) internal successors, (1236), 397 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1236 transitions. [2022-01-18 15:16:52,890 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1236 transitions. Word has length 20 [2022-01-18 15:16:52,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:52,890 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1236 transitions. [2022-01-18 15:16:52,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:52,890 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1236 transitions. [2022-01-18 15:16:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:52,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:52,891 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:52,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-01-18 15:16:53,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:53,091 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1791711732, now seen corresponding path program 161 times [2022-01-18 15:16:53,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:53,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242881155] [2022-01-18 15:16:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:53,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:53,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:53,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242881155] [2022-01-18 15:16:53,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242881155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:53,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443382835] [2022-01-18 15:16:53,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:53,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:53,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:53,191 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:53,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 15:16:53,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:53,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:53,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:53,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:53,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:16:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:53,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:53,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:53,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:53,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443382835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:53,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:53,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:53,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799150519] [2022-01-18 15:16:53,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:53,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:53,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:53,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:53,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:53,707 INFO L87 Difference]: Start difference. First operand 398 states and 1236 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:54,010 INFO L93 Difference]: Finished difference Result 509 states and 1504 transitions. [2022-01-18 15:16:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:16:54,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:54,012 INFO L225 Difference]: With dead ends: 509 [2022-01-18 15:16:54,012 INFO L226 Difference]: Without dead ends: 509 [2022-01-18 15:16:54,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:54,012 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 113 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:54,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 205 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-18 15:16:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 387. [2022-01-18 15:16:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.106217616580311) internal successors, (1199), 386 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1199 transitions. [2022-01-18 15:16:54,016 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1199 transitions. Word has length 20 [2022-01-18 15:16:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:54,016 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1199 transitions. [2022-01-18 15:16:54,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1199 transitions. [2022-01-18 15:16:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:54,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:54,017 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:54,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:54,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:54,217 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:54,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:54,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2087138914, now seen corresponding path program 162 times [2022-01-18 15:16:54,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:54,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938214124] [2022-01-18 15:16:54,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:54,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:54,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:54,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938214124] [2022-01-18 15:16:54,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938214124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:54,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258231105] [2022-01-18 15:16:54,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:54,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:54,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:54,302 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:54,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 15:16:54,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:16:54,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:54,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:54,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:54,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:54,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:54,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258231105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:54,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:54,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:54,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420370578] [2022-01-18 15:16:54,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:54,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:54,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:54,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:54,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:54,845 INFO L87 Difference]: Start difference. First operand 387 states and 1199 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:55,032 INFO L93 Difference]: Finished difference Result 431 states and 1311 transitions. [2022-01-18 15:16:55,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:55,032 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:55,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:55,033 INFO L225 Difference]: With dead ends: 431 [2022-01-18 15:16:55,033 INFO L226 Difference]: Without dead ends: 431 [2022-01-18 15:16:55,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:55,033 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:55,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 133 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:16:55,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-18 15:16:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 384. [2022-01-18 15:16:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0992167101827675) internal successors, (1187), 383 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1187 transitions. [2022-01-18 15:16:55,037 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1187 transitions. Word has length 20 [2022-01-18 15:16:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:55,037 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1187 transitions. [2022-01-18 15:16:55,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1187 transitions. [2022-01-18 15:16:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:55,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:55,038 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:55,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:55,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:55,238 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:55,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:55,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1371280066, now seen corresponding path program 163 times [2022-01-18 15:16:55,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:55,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954700536] [2022-01-18 15:16:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:55,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:55,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:55,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954700536] [2022-01-18 15:16:55,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954700536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:55,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892785994] [2022-01-18 15:16:55,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:55,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:55,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:55,373 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:55,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 15:16:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:55,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:55,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:55,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:55,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:55,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:55,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892785994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:55,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:55,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:16:55,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168819359] [2022-01-18 15:16:55,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:55,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:55,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:55,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:55,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:55,880 INFO L87 Difference]: Start difference. First operand 384 states and 1187 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:56,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:56,109 INFO L93 Difference]: Finished difference Result 476 states and 1405 transitions. [2022-01-18 15:16:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:56,109 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:56,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:56,110 INFO L225 Difference]: With dead ends: 476 [2022-01-18 15:16:56,110 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 15:16:56,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:56,110 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:56,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 188 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:56,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 15:16:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 398. [2022-01-18 15:16:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.08816120906801) internal successors, (1226), 397 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1226 transitions. [2022-01-18 15:16:56,115 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1226 transitions. Word has length 20 [2022-01-18 15:16:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:56,115 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1226 transitions. [2022-01-18 15:16:56,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1226 transitions. [2022-01-18 15:16:56,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:56,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:56,115 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:56,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 15:16:56,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:56,316 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1395179980, now seen corresponding path program 164 times [2022-01-18 15:16:56,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:56,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509691375] [2022-01-18 15:16:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:56,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:56,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:56,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509691375] [2022-01-18 15:16:56,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509691375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:56,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069455769] [2022-01-18 15:16:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:56,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:56,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:56,413 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:56,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 15:16:56,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:56,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:56,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:56,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:56,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:56,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:56,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069455769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:56,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:56,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:56,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39610584] [2022-01-18 15:16:56,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:56,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:56,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:56,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:56,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:56,930 INFO L87 Difference]: Start difference. First operand 398 states and 1226 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:57,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:57,196 INFO L93 Difference]: Finished difference Result 482 states and 1426 transitions. [2022-01-18 15:16:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:16:57,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:57,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:57,197 INFO L225 Difference]: With dead ends: 482 [2022-01-18 15:16:57,197 INFO L226 Difference]: Without dead ends: 482 [2022-01-18 15:16:57,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:57,197 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:57,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 230 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-18 15:16:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 396. [2022-01-18 15:16:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.091139240506329) internal successors, (1221), 395 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1221 transitions. [2022-01-18 15:16:57,201 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1221 transitions. Word has length 20 [2022-01-18 15:16:57,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:57,201 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1221 transitions. [2022-01-18 15:16:57,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1221 transitions. [2022-01-18 15:16:57,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:57,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:57,202 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:57,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-18 15:16:57,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-01-18 15:16:57,402 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:57,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1416652378, now seen corresponding path program 165 times [2022-01-18 15:16:57,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:57,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898865950] [2022-01-18 15:16:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:57,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:57,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:57,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898865950] [2022-01-18 15:16:57,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898865950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:57,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689888467] [2022-01-18 15:16:57,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:57,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:57,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:57,488 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:57,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 15:16:57,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:57,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:57,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:57,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:57,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:57,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:57,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:16:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:57,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689888467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:57,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:57,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:16:57,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277673623] [2022-01-18 15:16:57,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:57,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:57,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:57,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:57,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:57,951 INFO L87 Difference]: Start difference. First operand 396 states and 1221 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:58,143 INFO L93 Difference]: Finished difference Result 451 states and 1361 transitions. [2022-01-18 15:16:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:58,143 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:58,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:58,144 INFO L225 Difference]: With dead ends: 451 [2022-01-18 15:16:58,144 INFO L226 Difference]: Without dead ends: 451 [2022-01-18 15:16:58,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:58,144 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:58,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 136 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:16:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-18 15:16:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 383. [2022-01-18 15:16:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.0968586387434556) internal successors, (1183), 382 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1183 transitions. [2022-01-18 15:16:58,148 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1183 transitions. Word has length 20 [2022-01-18 15:16:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:58,148 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1183 transitions. [2022-01-18 15:16:58,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1183 transitions. [2022-01-18 15:16:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:58,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:58,149 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:58,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-01-18 15:16:58,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-01-18 15:16:58,349 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:58,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:58,349 INFO L85 PathProgramCache]: Analyzing trace with hash 837061820, now seen corresponding path program 166 times [2022-01-18 15:16:58,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:58,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853500519] [2022-01-18 15:16:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:58,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:58,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:58,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853500519] [2022-01-18 15:16:58,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853500519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:58,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232073408] [2022-01-18 15:16:58,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:58,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:58,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:58,422 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:58,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 15:16:58,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:58,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:58,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:58,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:58,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:16:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:58,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:58,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:58,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:58,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232073408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:58,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:58,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:16:58,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279101032] [2022-01-18 15:16:58,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:58,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:16:58,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:58,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:16:58,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:16:58,855 INFO L87 Difference]: Start difference. First operand 383 states and 1183 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:59,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:59,075 INFO L93 Difference]: Finished difference Result 421 states and 1272 transitions. [2022-01-18 15:16:59,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:59,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:16:59,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:59,075 INFO L225 Difference]: With dead ends: 421 [2022-01-18 15:16:59,075 INFO L226 Difference]: Without dead ends: 409 [2022-01-18 15:16:59,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:59,076 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:59,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 121 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:16:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-18 15:16:59,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 387. [2022-01-18 15:16:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.0906735751295336) internal successors, (1193), 386 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1193 transitions. [2022-01-18 15:16:59,080 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1193 transitions. Word has length 20 [2022-01-18 15:16:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:59,080 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1193 transitions. [2022-01-18 15:16:59,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1193 transitions. [2022-01-18 15:16:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:16:59,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:59,081 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:59,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:59,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-01-18 15:16:59,281 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:59,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1577959154, now seen corresponding path program 167 times [2022-01-18 15:16:59,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:59,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911276539] [2022-01-18 15:16:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:59,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:59,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:59,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911276539] [2022-01-18 15:16:59,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911276539] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:59,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550261198] [2022-01-18 15:16:59,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:59,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:59,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:59,361 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:59,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 15:16:59,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:59,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:16:59,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:59,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:16:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:59,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:59,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:59,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:16:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:59,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550261198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:59,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:59,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:16:59,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498102745] [2022-01-18 15:16:59,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:59,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:16:59,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:59,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:16:59,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:16:59,826 INFO L87 Difference]: Start difference. First operand 387 states and 1193 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:00,124 INFO L93 Difference]: Finished difference Result 446 states and 1324 transitions. [2022-01-18 15:17:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:00,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:00,125 INFO L225 Difference]: With dead ends: 446 [2022-01-18 15:17:00,125 INFO L226 Difference]: Without dead ends: 440 [2022-01-18 15:17:00,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:17:00,126 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:00,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 166 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-18 15:17:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 397. [2022-01-18 15:17:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.080808080808081) internal successors, (1220), 396 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1220 transitions. [2022-01-18 15:17:00,130 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1220 transitions. Word has length 20 [2022-01-18 15:17:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:00,130 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1220 transitions. [2022-01-18 15:17:00,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1220 transitions. [2022-01-18 15:17:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:00,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:00,130 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:00,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-01-18 15:17:00,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 15:17:00,331 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:00,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1601859068, now seen corresponding path program 168 times [2022-01-18 15:17:00,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:00,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190137452] [2022-01-18 15:17:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:00,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:00,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:00,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190137452] [2022-01-18 15:17:00,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190137452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:00,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981110975] [2022-01-18 15:17:00,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:00,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:00,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:00,414 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:00,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 15:17:00,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:17:00,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:00,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:00,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:00,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:17:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:00,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:00,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:00,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:00,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981110975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:00,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:00,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:17:00,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549840181] [2022-01-18 15:17:00,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:00,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:17:00,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:00,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:17:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:00,913 INFO L87 Difference]: Start difference. First operand 397 states and 1220 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:01,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:01,127 INFO L93 Difference]: Finished difference Result 417 states and 1270 transitions. [2022-01-18 15:17:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:01,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:01,128 INFO L225 Difference]: With dead ends: 417 [2022-01-18 15:17:01,128 INFO L226 Difference]: Without dead ends: 417 [2022-01-18 15:17:01,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:01,128 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:01,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 123 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:17:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-01-18 15:17:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 385. [2022-01-18 15:17:01,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.09375) internal successors, (1188), 384 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:01,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1188 transitions. [2022-01-18 15:17:01,132 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1188 transitions. Word has length 20 [2022-01-18 15:17:01,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:01,132 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1188 transitions. [2022-01-18 15:17:01,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1188 transitions. [2022-01-18 15:17:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:01,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:01,133 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:01,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-01-18 15:17:01,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 15:17:01,333 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:01,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:01,334 INFO L85 PathProgramCache]: Analyzing trace with hash 310501976, now seen corresponding path program 169 times [2022-01-18 15:17:01,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:01,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166399879] [2022-01-18 15:17:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:01,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:01,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:01,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166399879] [2022-01-18 15:17:01,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166399879] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:01,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104634043] [2022-01-18 15:17:01,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:01,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:01,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:01,408 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:01,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 15:17:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:01,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:01,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:01,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:17:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:01,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:01,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:01,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:17:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:01,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104634043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:01,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:01,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:17:01,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721189130] [2022-01-18 15:17:01,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:01,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:17:01,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:01,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:17:01,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:17:01,783 INFO L87 Difference]: Start difference. First operand 385 states and 1188 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:01,968 INFO L93 Difference]: Finished difference Result 452 states and 1339 transitions. [2022-01-18 15:17:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:01,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:01,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:01,968 INFO L225 Difference]: With dead ends: 452 [2022-01-18 15:17:01,969 INFO L226 Difference]: Without dead ends: 446 [2022-01-18 15:17:01,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:17:01,969 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:01,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 145 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:17:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-01-18 15:17:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 399. [2022-01-18 15:17:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0829145728643215) internal successors, (1227), 398 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1227 transitions. [2022-01-18 15:17:01,973 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1227 transitions. Word has length 20 [2022-01-18 15:17:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:01,973 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1227 transitions. [2022-01-18 15:17:01,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1227 transitions. [2022-01-18 15:17:01,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:01,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:01,974 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:01,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:02,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:02,174 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash 334401890, now seen corresponding path program 170 times [2022-01-18 15:17:02,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:02,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971304602] [2022-01-18 15:17:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:02,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:02,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971304602] [2022-01-18 15:17:02,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971304602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775676421] [2022-01-18 15:17:02,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:02,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:02,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:02,237 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:02,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 15:17:02,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:02,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:02,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:02,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:02,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:17:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:02,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:02,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:02,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:17:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:02,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775676421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:02,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:02,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:17:02,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318928259] [2022-01-18 15:17:02,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:02,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:17:02,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:02,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:17:02,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:17:02,615 INFO L87 Difference]: Start difference. First operand 399 states and 1227 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:02,776 INFO L93 Difference]: Finished difference Result 452 states and 1345 transitions. [2022-01-18 15:17:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:17:02,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:02,776 INFO L225 Difference]: With dead ends: 452 [2022-01-18 15:17:02,777 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 15:17:02,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:02,777 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 66 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:02,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 115 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:17:02,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 15:17:02,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 397. [2022-01-18 15:17:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.085858585858586) internal successors, (1222), 396 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1222 transitions. [2022-01-18 15:17:02,781 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1222 transitions. Word has length 20 [2022-01-18 15:17:02,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:02,781 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1222 transitions. [2022-01-18 15:17:02,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:02,781 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1222 transitions. [2022-01-18 15:17:02,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:02,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:02,782 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:02,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:02,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:02,983 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:02,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:02,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1817536828, now seen corresponding path program 171 times [2022-01-18 15:17:02,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:02,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038659585] [2022-01-18 15:17:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:02,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:03,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:03,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038659585] [2022-01-18 15:17:03,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038659585] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:03,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374002943] [2022-01-18 15:17:03,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:03,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:03,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:03,046 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:03,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 15:17:03,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:17:03,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:03,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:03,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:03,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:03,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:03,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:17:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:03,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374002943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:03,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:03,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:17:03,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618225211] [2022-01-18 15:17:03,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:03,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:17:03,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:03,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:17:03,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:17:03,390 INFO L87 Difference]: Start difference. First operand 397 states and 1222 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:03,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:03,556 INFO L93 Difference]: Finished difference Result 427 states and 1295 transitions. [2022-01-18 15:17:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:03,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:03,557 INFO L225 Difference]: With dead ends: 427 [2022-01-18 15:17:03,557 INFO L226 Difference]: Without dead ends: 427 [2022-01-18 15:17:03,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:17:03,557 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:03,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 108 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:17:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-18 15:17:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 385. [2022-01-18 15:17:03,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.09375) internal successors, (1188), 384 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:03,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1188 transitions. [2022-01-18 15:17:03,561 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1188 transitions. Word has length 20 [2022-01-18 15:17:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:03,561 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1188 transitions. [2022-01-18 15:17:03,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1188 transitions. [2022-01-18 15:17:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:03,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:03,562 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:03,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:03,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-01-18 15:17:03,762 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash -76078556, now seen corresponding path program 172 times [2022-01-18 15:17:03,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:03,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016346990] [2022-01-18 15:17:03,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:03,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:03,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016346990] [2022-01-18 15:17:03,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016346990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267641540] [2022-01-18 15:17:03,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:03,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:03,857 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:03,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 15:17:03,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:03,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:03,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:03,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:04,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:17:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:04,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:04,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:04,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:04,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267641540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:04,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:04,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:04,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243678856] [2022-01-18 15:17:04,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:04,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:04,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:04,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:04,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:04,460 INFO L87 Difference]: Start difference. First operand 385 states and 1188 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:04,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:04,956 INFO L93 Difference]: Finished difference Result 611 states and 1826 transitions. [2022-01-18 15:17:04,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:04,957 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:04,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:04,957 INFO L225 Difference]: With dead ends: 611 [2022-01-18 15:17:04,957 INFO L226 Difference]: Without dead ends: 611 [2022-01-18 15:17:04,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:04,958 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 146 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:04,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 208 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-18 15:17:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 396. [2022-01-18 15:17:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.1139240506329116) internal successors, (1230), 395 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1230 transitions. [2022-01-18 15:17:04,963 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1230 transitions. Word has length 20 [2022-01-18 15:17:04,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:04,963 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1230 transitions. [2022-01-18 15:17:04,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:04,963 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1230 transitions. [2022-01-18 15:17:04,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:04,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:04,963 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:04,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-01-18 15:17:05,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:05,164 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:05,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:05,164 INFO L85 PathProgramCache]: Analyzing trace with hash 805998878, now seen corresponding path program 173 times [2022-01-18 15:17:05,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:05,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630955407] [2022-01-18 15:17:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:05,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:05,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:05,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630955407] [2022-01-18 15:17:05,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630955407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:05,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780009803] [2022-01-18 15:17:05,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:05,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:05,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:05,257 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:05,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 15:17:05,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:05,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:05,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:05,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:05,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:17:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:05,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:05,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:05,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:05,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780009803] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:05,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:05,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:17:05,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367609463] [2022-01-18 15:17:05,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:05,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:05,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:05,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:05,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:05,831 INFO L87 Difference]: Start difference. First operand 396 states and 1230 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:06,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:06,531 INFO L93 Difference]: Finished difference Result 617 states and 1833 transitions. [2022-01-18 15:17:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:17:06,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:06,532 INFO L225 Difference]: With dead ends: 617 [2022-01-18 15:17:06,532 INFO L226 Difference]: Without dead ends: 611 [2022-01-18 15:17:06,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:06,535 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 172 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:06,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 202 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-18 15:17:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 393. [2022-01-18 15:17:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.1096938775510203) internal successors, (1219), 392 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1219 transitions. [2022-01-18 15:17:06,540 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1219 transitions. Word has length 20 [2022-01-18 15:17:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:06,540 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1219 transitions. [2022-01-18 15:17:06,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1219 transitions. [2022-01-18 15:17:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:06,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:06,541 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:06,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-01-18 15:17:06,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:06,755 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:06,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:06,756 INFO L85 PathProgramCache]: Analyzing trace with hash 270769076, now seen corresponding path program 174 times [2022-01-18 15:17:06,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:06,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716807135] [2022-01-18 15:17:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:06,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:06,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:06,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716807135] [2022-01-18 15:17:06,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716807135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:06,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197625194] [2022-01-18 15:17:06,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:06,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:06,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:06,837 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:06,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 15:17:06,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:17:06,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:06,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:06,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:07,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:17:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:07,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:07,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:07,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:07,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197625194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:07,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:07,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:17:07,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676788151] [2022-01-18 15:17:07,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:07,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:07,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:07,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:07,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:07,393 INFO L87 Difference]: Start difference. First operand 393 states and 1219 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:07,839 INFO L93 Difference]: Finished difference Result 581 states and 1751 transitions. [2022-01-18 15:17:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:07,839 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:07,840 INFO L225 Difference]: With dead ends: 581 [2022-01-18 15:17:07,840 INFO L226 Difference]: Without dead ends: 569 [2022-01-18 15:17:07,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:17:07,840 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 96 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:07,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 203 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-18 15:17:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 390. [2022-01-18 15:17:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1053984575835476) internal successors, (1208), 389 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1208 transitions. [2022-01-18 15:17:07,845 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1208 transitions. Word has length 20 [2022-01-18 15:17:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:07,845 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1208 transitions. [2022-01-18 15:17:07,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:07,845 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1208 transitions. [2022-01-18 15:17:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:07,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:07,846 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:07,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-01-18 15:17:08,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-01-18 15:17:08,049 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:08,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:08,049 INFO L85 PathProgramCache]: Analyzing trace with hash -741923456, now seen corresponding path program 175 times [2022-01-18 15:17:08,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:08,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881028458] [2022-01-18 15:17:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:08,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:08,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:08,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881028458] [2022-01-18 15:17:08,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881028458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:08,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840920828] [2022-01-18 15:17:08,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:08,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:08,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:08,126 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:08,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 15:17:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:08,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:08,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:08,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:17:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:08,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:08,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:08,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:08,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840920828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:08,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:08,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:17:08,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29816572] [2022-01-18 15:17:08,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:08,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:17:08,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:08,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:17:08,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:08,652 INFO L87 Difference]: Start difference. First operand 390 states and 1208 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:09,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:09,064 INFO L93 Difference]: Finished difference Result 613 states and 1811 transitions. [2022-01-18 15:17:09,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:09,065 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:09,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:09,065 INFO L225 Difference]: With dead ends: 613 [2022-01-18 15:17:09,065 INFO L226 Difference]: Without dead ends: 595 [2022-01-18 15:17:09,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:17:09,066 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 109 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:09,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 201 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-18 15:17:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 387. [2022-01-18 15:17:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.1010362694300517) internal successors, (1197), 386 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1197 transitions. [2022-01-18 15:17:09,071 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1197 transitions. Word has length 20 [2022-01-18 15:17:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:09,071 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1197 transitions. [2022-01-18 15:17:09,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1197 transitions. [2022-01-18 15:17:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:09,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:09,071 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:09,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-01-18 15:17:09,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:09,275 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:09,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:09,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1965262844, now seen corresponding path program 176 times [2022-01-18 15:17:09,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:09,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212078126] [2022-01-18 15:17:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:09,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:09,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:09,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212078126] [2022-01-18 15:17:09,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212078126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:09,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317752266] [2022-01-18 15:17:09,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:09,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:09,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:09,418 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:09,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 15:17:09,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:09,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:09,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:09,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:10,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:10,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:17:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:10,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:10,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:10,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:10,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317752266] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:10,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:10,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:10,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261702535] [2022-01-18 15:17:10,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:10,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:10,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:10,369 INFO L87 Difference]: Start difference. First operand 387 states and 1197 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:10,678 INFO L93 Difference]: Finished difference Result 538 states and 1643 transitions. [2022-01-18 15:17:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:10,679 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:10,679 INFO L225 Difference]: With dead ends: 538 [2022-01-18 15:17:10,679 INFO L226 Difference]: Without dead ends: 538 [2022-01-18 15:17:10,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:10,680 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 111 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:10,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 193 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 389 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-01-18 15:17:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-18 15:17:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 394. [2022-01-18 15:17:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.114503816793893) internal successors, (1224), 393 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1224 transitions. [2022-01-18 15:17:10,684 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1224 transitions. Word has length 20 [2022-01-18 15:17:10,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:10,684 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1224 transitions. [2022-01-18 15:17:10,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1224 transitions. [2022-01-18 15:17:10,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:10,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:10,685 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:10,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-01-18 15:17:10,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:10,885 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:10,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1447627018, now seen corresponding path program 177 times [2022-01-18 15:17:10,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:10,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467150037] [2022-01-18 15:17:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:10,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:10,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:10,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467150037] [2022-01-18 15:17:10,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467150037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:10,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644427860] [2022-01-18 15:17:10,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:10,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:10,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:10,982 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:10,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 15:17:11,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:17:11,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:11,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:11,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:11,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:17:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:11,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:11,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:11,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:11,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644427860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:11,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:11,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:17:11,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503972213] [2022-01-18 15:17:11,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:11,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:11,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:11,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:11,608 INFO L87 Difference]: Start difference. First operand 394 states and 1224 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:12,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:12,221 INFO L93 Difference]: Finished difference Result 629 states and 1863 transitions. [2022-01-18 15:17:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:17:12,221 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:12,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:12,222 INFO L225 Difference]: With dead ends: 629 [2022-01-18 15:17:12,222 INFO L226 Difference]: Without dead ends: 623 [2022-01-18 15:17:12,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:12,223 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:12,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 225 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-18 15:17:12,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 391. [2022-01-18 15:17:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.1102564102564103) internal successors, (1213), 390 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1213 transitions. [2022-01-18 15:17:12,228 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1213 transitions. Word has length 20 [2022-01-18 15:17:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:12,228 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1213 transitions. [2022-01-18 15:17:12,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:12,228 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1213 transitions. [2022-01-18 15:17:12,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:12,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:12,228 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:12,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:12,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:12,429 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:12,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1982856820, now seen corresponding path program 178 times [2022-01-18 15:17:12,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:12,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981587651] [2022-01-18 15:17:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:12,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:12,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:12,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981587651] [2022-01-18 15:17:12,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981587651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:12,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514918290] [2022-01-18 15:17:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:12,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:12,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:12,521 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:12,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 15:17:12,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:12,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:12,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:12,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:12,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:17:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:12,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:13,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:13,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:13,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514918290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:13,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:13,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:17:13,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164994122] [2022-01-18 15:17:13,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:13,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:13,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:13,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:13,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:13,139 INFO L87 Difference]: Start difference. First operand 391 states and 1213 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:13,563 INFO L93 Difference]: Finished difference Result 593 states and 1781 transitions. [2022-01-18 15:17:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:13,563 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:13,564 INFO L225 Difference]: With dead ends: 593 [2022-01-18 15:17:13,564 INFO L226 Difference]: Without dead ends: 581 [2022-01-18 15:17:13,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:17:13,564 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:13,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 145 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-18 15:17:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 388. [2022-01-18 15:17:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1059431524547803) internal successors, (1202), 387 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1202 transitions. [2022-01-18 15:17:13,577 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1202 transitions. Word has length 20 [2022-01-18 15:17:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:13,580 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1202 transitions. [2022-01-18 15:17:13,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1202 transitions. [2022-01-18 15:17:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:13,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:13,581 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:13,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:13,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-01-18 15:17:13,781 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:13,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:13,782 INFO L85 PathProgramCache]: Analyzing trace with hash -836723578, now seen corresponding path program 179 times [2022-01-18 15:17:13,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:13,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001182819] [2022-01-18 15:17:13,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:13,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:13,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:13,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001182819] [2022-01-18 15:17:13,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001182819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:13,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97928730] [2022-01-18 15:17:13,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:13,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:13,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:13,885 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:13,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 15:17:13,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:13,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:14,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:14,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:14,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:17:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:14,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:14,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:14,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:14,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97928730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:14,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:14,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:14,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587206180] [2022-01-18 15:17:14,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:14,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:14,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:14,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:14,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:14,612 INFO L87 Difference]: Start difference. First operand 388 states and 1202 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:15,462 INFO L93 Difference]: Finished difference Result 701 states and 2053 transitions. [2022-01-18 15:17:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:15,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:15,463 INFO L225 Difference]: With dead ends: 701 [2022-01-18 15:17:15,463 INFO L226 Difference]: Without dead ends: 701 [2022-01-18 15:17:15,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:17:15,464 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 214 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:15,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 268 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:17:15,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-18 15:17:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 396. [2022-01-18 15:17:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.1341772151898732) internal successors, (1238), 395 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1238 transitions. [2022-01-18 15:17:15,469 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1238 transitions. Word has length 20 [2022-01-18 15:17:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:15,469 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1238 transitions. [2022-01-18 15:17:15,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:15,469 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1238 transitions. [2022-01-18 15:17:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:15,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:15,470 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:15,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:15,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:15,670 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:15,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:15,670 INFO L85 PathProgramCache]: Analyzing trace with hash 45353856, now seen corresponding path program 180 times [2022-01-18 15:17:15,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:15,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631386273] [2022-01-18 15:17:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:15,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:15,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:15,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631386273] [2022-01-18 15:17:15,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631386273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:15,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448470788] [2022-01-18 15:17:15,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:15,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:15,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:15,777 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:15,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 15:17:15,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:17:15,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:15,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:15,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:16,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-01-18 15:17:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:16,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:16,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:16,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:16,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448470788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:16,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:16,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:17:16,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417736748] [2022-01-18 15:17:16,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:16,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:16,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:16,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:16,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:16,400 INFO L87 Difference]: Start difference. First operand 396 states and 1238 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:17,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:17,287 INFO L93 Difference]: Finished difference Result 730 states and 2099 transitions. [2022-01-18 15:17:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:17:17,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:17,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:17,289 INFO L225 Difference]: With dead ends: 730 [2022-01-18 15:17:17,289 INFO L226 Difference]: Without dead ends: 724 [2022-01-18 15:17:17,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:17:17,289 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 219 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:17,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 223 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:17,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-18 15:17:17,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 399. [2022-01-18 15:17:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.1155778894472363) internal successors, (1240), 398 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1240 transitions. [2022-01-18 15:17:17,295 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1240 transitions. Word has length 20 [2022-01-18 15:17:17,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:17,295 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1240 transitions. [2022-01-18 15:17:17,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1240 transitions. [2022-01-18 15:17:17,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:17,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:17,295 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:17,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-01-18 15:17:17,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:17,496 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:17,496 INFO L85 PathProgramCache]: Analyzing trace with hash -95826244, now seen corresponding path program 181 times [2022-01-18 15:17:17,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:17,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881978205] [2022-01-18 15:17:17,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:17,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:17,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:17,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881978205] [2022-01-18 15:17:17,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881978205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:17,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048167519] [2022-01-18 15:17:17,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:17,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:17,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:17,610 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:17,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 15:17:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:17,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:17,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:18,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:17:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:18,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:18,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:18,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:18,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048167519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:18,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:18,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:18,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246495713] [2022-01-18 15:17:18,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:18,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:18,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:18,378 INFO L87 Difference]: Start difference. First operand 399 states and 1240 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:18,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:18,927 INFO L93 Difference]: Finished difference Result 669 states and 1974 transitions. [2022-01-18 15:17:18,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:18,927 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:18,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:18,928 INFO L225 Difference]: With dead ends: 669 [2022-01-18 15:17:18,928 INFO L226 Difference]: Without dead ends: 669 [2022-01-18 15:17:18,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:18,928 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 161 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:18,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 174 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:18,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-18 15:17:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 392. [2022-01-18 15:17:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.125319693094629) internal successors, (1222), 391 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:18,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1222 transitions. [2022-01-18 15:17:18,934 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1222 transitions. Word has length 20 [2022-01-18 15:17:18,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:18,934 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1222 transitions. [2022-01-18 15:17:18,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1222 transitions. [2022-01-18 15:17:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:18,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:18,934 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:18,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-01-18 15:17:19,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-01-18 15:17:19,135 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:19,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:19,135 INFO L85 PathProgramCache]: Analyzing trace with hash 898549376, now seen corresponding path program 182 times [2022-01-18 15:17:19,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:19,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921093700] [2022-01-18 15:17:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:19,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:19,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921093700] [2022-01-18 15:17:19,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921093700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064954586] [2022-01-18 15:17:19,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:19,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:19,247 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:19,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 15:17:19,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:19,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:19,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:19,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:19,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:17:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:19,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:19,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:19,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:19,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064954586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:19,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:19,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:19,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333702744] [2022-01-18 15:17:19,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:19,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:19,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:19,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:19,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:19,934 INFO L87 Difference]: Start difference. First operand 392 states and 1222 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:20,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:20,629 INFO L93 Difference]: Finished difference Result 665 states and 1963 transitions. [2022-01-18 15:17:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:17:20,629 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:20,630 INFO L225 Difference]: With dead ends: 665 [2022-01-18 15:17:20,630 INFO L226 Difference]: Without dead ends: 665 [2022-01-18 15:17:20,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:17:20,631 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:20,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 255 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:17:20,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-18 15:17:20,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 389. [2022-01-18 15:17:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.1108247422680413) internal successors, (1207), 388 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1207 transitions. [2022-01-18 15:17:20,636 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1207 transitions. Word has length 20 [2022-01-18 15:17:20,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:20,636 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1207 transitions. [2022-01-18 15:17:20,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1207 transitions. [2022-01-18 15:17:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:20,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:20,637 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:20,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:20,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:20,849 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1879002508, now seen corresponding path program 183 times [2022-01-18 15:17:20,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:20,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752902201] [2022-01-18 15:17:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:20,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:20,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:20,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752902201] [2022-01-18 15:17:20,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752902201] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:20,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578768930] [2022-01-18 15:17:20,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:20,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:20,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:20,930 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:20,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 15:17:21,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:17:21,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:21,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:21,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:21,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:17:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:21,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:21,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:21,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:21,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578768930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:21,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:21,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:17:21,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529007812] [2022-01-18 15:17:21,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:21,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:17:21,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:21,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:17:21,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:17:21,583 INFO L87 Difference]: Start difference. First operand 389 states and 1207 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:22,294 INFO L93 Difference]: Finished difference Result 669 states and 1966 transitions. [2022-01-18 15:17:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:17:22,295 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:22,296 INFO L225 Difference]: With dead ends: 669 [2022-01-18 15:17:22,296 INFO L226 Difference]: Without dead ends: 663 [2022-01-18 15:17:22,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:22,296 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 170 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:22,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 175 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-18 15:17:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 399. [2022-01-18 15:17:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.100502512562814) internal successors, (1234), 398 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1234 transitions. [2022-01-18 15:17:22,301 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1234 transitions. Word has length 20 [2022-01-18 15:17:22,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:22,302 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1234 transitions. [2022-01-18 15:17:22,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1234 transitions. [2022-01-18 15:17:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:22,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:22,302 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:22,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-01-18 15:17:22,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:22,511 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:22,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1902902422, now seen corresponding path program 184 times [2022-01-18 15:17:22,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:22,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472502944] [2022-01-18 15:17:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:22,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:22,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472502944] [2022-01-18 15:17:22,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472502944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246585374] [2022-01-18 15:17:22,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:22,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:22,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:22,620 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:22,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 15:17:22,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:22,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:22,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:22,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:22,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:17:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:23,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:23,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:23,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:23,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246585374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:23,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:23,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:17:23,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396170066] [2022-01-18 15:17:23,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:23,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:17:23,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:17:23,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:23,247 INFO L87 Difference]: Start difference. First operand 399 states and 1234 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:23,854 INFO L93 Difference]: Finished difference Result 646 states and 1927 transitions. [2022-01-18 15:17:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:23,854 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:23,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:23,855 INFO L225 Difference]: With dead ends: 646 [2022-01-18 15:17:23,855 INFO L226 Difference]: Without dead ends: 646 [2022-01-18 15:17:23,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:23,855 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 125 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:23,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 197 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-18 15:17:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 388. [2022-01-18 15:17:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1059431524547803) internal successors, (1202), 387 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1202 transitions. [2022-01-18 15:17:23,860 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1202 transitions. Word has length 20 [2022-01-18 15:17:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:23,861 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1202 transitions. [2022-01-18 15:17:23,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1202 transitions. [2022-01-18 15:17:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:23,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:23,861 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:23,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-01-18 15:17:24,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:24,062 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:24,062 INFO L85 PathProgramCache]: Analyzing trace with hash -974323456, now seen corresponding path program 185 times [2022-01-18 15:17:24,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:24,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169741358] [2022-01-18 15:17:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:24,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:24,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:24,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169741358] [2022-01-18 15:17:24,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169741358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:24,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117235637] [2022-01-18 15:17:24,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:24,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:24,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:24,141 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:24,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 15:17:24,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:24,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:24,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:24,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:24,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:17:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:24,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:24,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:24,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:24,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117235637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:24,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:24,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:17:24,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94345120] [2022-01-18 15:17:24,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:24,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:17:24,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:24,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:17:24,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:17:24,700 INFO L87 Difference]: Start difference. First operand 388 states and 1202 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:25,069 INFO L93 Difference]: Finished difference Result 586 states and 1764 transitions. [2022-01-18 15:17:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:25,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:25,070 INFO L225 Difference]: With dead ends: 586 [2022-01-18 15:17:25,070 INFO L226 Difference]: Without dead ends: 574 [2022-01-18 15:17:25,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:17:25,070 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:25,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 117 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:17:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-18 15:17:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 390. [2022-01-18 15:17:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.102827763496144) internal successors, (1207), 389 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1207 transitions. [2022-01-18 15:17:25,075 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1207 transitions. Word has length 20 [2022-01-18 15:17:25,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:25,075 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1207 transitions. [2022-01-18 15:17:25,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1207 transitions. [2022-01-18 15:17:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:25,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:25,076 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:25,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-01-18 15:17:25,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:25,276 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash -233426122, now seen corresponding path program 186 times [2022-01-18 15:17:25,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:25,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157839902] [2022-01-18 15:17:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:25,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:25,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:25,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157839902] [2022-01-18 15:17:25,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157839902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:25,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564186617] [2022-01-18 15:17:25,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:25,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:25,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:25,380 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:25,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 15:17:25,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:17:25,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:25,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:25,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:25,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:17:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:25,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:25,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:25,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:25,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564186617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:25,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:25,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:17:25,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513119615] [2022-01-18 15:17:25,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:25,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:25,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:25,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:25,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:25,986 INFO L87 Difference]: Start difference. First operand 390 states and 1207 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:26,594 INFO L93 Difference]: Finished difference Result 611 states and 1816 transitions. [2022-01-18 15:17:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:26,595 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:26,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:26,595 INFO L225 Difference]: With dead ends: 611 [2022-01-18 15:17:26,595 INFO L226 Difference]: Without dead ends: 605 [2022-01-18 15:17:26,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:17:26,596 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 152 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:26,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 191 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-18 15:17:26,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 400. [2022-01-18 15:17:26,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.092731829573935) internal successors, (1234), 399 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1234 transitions. [2022-01-18 15:17:26,601 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1234 transitions. Word has length 20 [2022-01-18 15:17:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:26,601 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1234 transitions. [2022-01-18 15:17:26,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:26,601 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1234 transitions. [2022-01-18 15:17:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:26,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:26,601 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:26,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-01-18 15:17:26,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:26,802 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash -209526208, now seen corresponding path program 187 times [2022-01-18 15:17:26,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:26,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006413655] [2022-01-18 15:17:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:26,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:26,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:26,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006413655] [2022-01-18 15:17:26,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006413655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:26,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597512089] [2022-01-18 15:17:26,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:26,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:26,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:26,916 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:26,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 15:17:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:27,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:27,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:27,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:17:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:27,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:27,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:27,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:27,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597512089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:27,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:27,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:27,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455386561] [2022-01-18 15:17:27,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:27,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:27,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:27,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:27,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:27,536 INFO L87 Difference]: Start difference. First operand 400 states and 1234 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:27,977 INFO L93 Difference]: Finished difference Result 582 states and 1762 transitions. [2022-01-18 15:17:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:27,978 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:27,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:27,978 INFO L225 Difference]: With dead ends: 582 [2022-01-18 15:17:27,978 INFO L226 Difference]: Without dead ends: 582 [2022-01-18 15:17:27,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:27,979 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:27,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 163 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:27,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-18 15:17:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 387. [2022-01-18 15:17:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.1010362694300517) internal successors, (1197), 386 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1197 transitions. [2022-01-18 15:17:27,990 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1197 transitions. Word has length 20 [2022-01-18 15:17:27,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:27,990 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1197 transitions. [2022-01-18 15:17:27,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:27,990 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1197 transitions. [2022-01-18 15:17:27,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:27,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:27,991 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:28,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-01-18 15:17:28,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-01-18 15:17:28,191 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:28,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:28,192 INFO L85 PathProgramCache]: Analyzing trace with hash 457839756, now seen corresponding path program 188 times [2022-01-18 15:17:28,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:28,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905982534] [2022-01-18 15:17:28,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:28,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:28,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:28,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905982534] [2022-01-18 15:17:28,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905982534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:28,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398135991] [2022-01-18 15:17:28,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:28,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:28,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:28,255 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:28,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 15:17:28,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:28,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:28,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:28,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:28,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:17:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:28,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:28,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:28,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:28,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398135991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:28,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:28,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:17:28,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444498469] [2022-01-18 15:17:28,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:28,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:17:28,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:28,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:17:28,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:17:28,734 INFO L87 Difference]: Start difference. First operand 387 states and 1197 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:29,084 INFO L93 Difference]: Finished difference Result 676 states and 1969 transitions. [2022-01-18 15:17:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:29,084 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:29,085 INFO L225 Difference]: With dead ends: 676 [2022-01-18 15:17:29,085 INFO L226 Difference]: Without dead ends: 658 [2022-01-18 15:17:29,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:29,085 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 139 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:29,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 142 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:17:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-01-18 15:17:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 389. [2022-01-18 15:17:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.097938144329897) internal successors, (1202), 388 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1202 transitions. [2022-01-18 15:17:29,090 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1202 transitions. Word has length 20 [2022-01-18 15:17:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:29,090 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1202 transitions. [2022-01-18 15:17:29,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1202 transitions. [2022-01-18 15:17:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:29,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:29,091 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:29,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-18 15:17:29,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-01-18 15:17:29,291 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2047710132, now seen corresponding path program 189 times [2022-01-18 15:17:29,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:29,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634553321] [2022-01-18 15:17:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:29,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:29,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:29,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634553321] [2022-01-18 15:17:29,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634553321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:29,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140186531] [2022-01-18 15:17:29,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:29,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:29,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:29,379 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:29,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 15:17:29,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:17:29,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:29,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:29,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:29,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:17:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:29,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:29,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:29,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:29,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140186531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:29,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:29,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:17:29,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223742522] [2022-01-18 15:17:29,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:29,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:29,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:29,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:29,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:29,927 INFO L87 Difference]: Start difference. First operand 389 states and 1202 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:30,389 INFO L93 Difference]: Finished difference Result 637 states and 1890 transitions. [2022-01-18 15:17:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:30,389 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:30,390 INFO L225 Difference]: With dead ends: 637 [2022-01-18 15:17:30,390 INFO L226 Difference]: Without dead ends: 625 [2022-01-18 15:17:30,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:17:30,391 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:30,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 180 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-18 15:17:30,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 391. [2022-01-18 15:17:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.094871794871795) internal successors, (1207), 390 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:30,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1207 transitions. [2022-01-18 15:17:30,395 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1207 transitions. Word has length 20 [2022-01-18 15:17:30,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:30,395 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1207 transitions. [2022-01-18 15:17:30,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1207 transitions. [2022-01-18 15:17:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:30,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:30,396 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:30,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:30,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-01-18 15:17:30,599 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:30,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1506359830, now seen corresponding path program 190 times [2022-01-18 15:17:30,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:30,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907481795] [2022-01-18 15:17:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:30,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:30,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:30,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907481795] [2022-01-18 15:17:30,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907481795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:30,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307164502] [2022-01-18 15:17:30,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:30,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:30,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:30,674 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:30,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 15:17:30,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:30,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:30,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:30,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:30,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:17:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:31,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:31,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:31,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:31,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307164502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:31,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:31,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:17:31,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631708778] [2022-01-18 15:17:31,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:31,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:17:31,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:31,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:17:31,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:17:31,240 INFO L87 Difference]: Start difference. First operand 391 states and 1207 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:31,744 INFO L93 Difference]: Finished difference Result 662 states and 1942 transitions. [2022-01-18 15:17:31,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:31,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:31,745 INFO L225 Difference]: With dead ends: 662 [2022-01-18 15:17:31,745 INFO L226 Difference]: Without dead ends: 656 [2022-01-18 15:17:31,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:17:31,745 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 106 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:31,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 200 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-01-18 15:17:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 401. [2022-01-18 15:17:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.085) internal successors, (1234), 400 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1234 transitions. [2022-01-18 15:17:31,750 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1234 transitions. Word has length 20 [2022-01-18 15:17:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:31,751 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1234 transitions. [2022-01-18 15:17:31,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1234 transitions. [2022-01-18 15:17:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:31,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:31,751 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:31,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-18 15:17:31,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:31,952 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1482459916, now seen corresponding path program 191 times [2022-01-18 15:17:31,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:31,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379372944] [2022-01-18 15:17:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:31,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:32,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:32,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379372944] [2022-01-18 15:17:32,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379372944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:32,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025771691] [2022-01-18 15:17:32,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:32,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:32,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:32,073 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:32,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 15:17:32,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:17:32,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:32,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:32,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:32,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:17:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:32,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:32,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:32,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:32,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025771691] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:32,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:32,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:32,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961691404] [2022-01-18 15:17:32,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:32,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:32,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:32,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:32,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:32,732 INFO L87 Difference]: Start difference. First operand 401 states and 1234 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:33,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:33,175 INFO L93 Difference]: Finished difference Result 633 states and 1888 transitions. [2022-01-18 15:17:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:33,175 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:33,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:33,176 INFO L225 Difference]: With dead ends: 633 [2022-01-18 15:17:33,176 INFO L226 Difference]: Without dead ends: 633 [2022-01-18 15:17:33,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:33,176 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:33,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 179 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:33,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-18 15:17:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 386. [2022-01-18 15:17:33,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.0961038961038962) internal successors, (1192), 385 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:33,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1192 transitions. [2022-01-18 15:17:33,182 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1192 transitions. Word has length 20 [2022-01-18 15:17:33,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:33,182 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1192 transitions. [2022-01-18 15:17:33,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:33,182 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1192 transitions. [2022-01-18 15:17:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:33,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:33,183 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:33,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-01-18 15:17:33,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:33,387 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:33,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:33,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1696516416, now seen corresponding path program 192 times [2022-01-18 15:17:33,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:33,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113816034] [2022-01-18 15:17:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:33,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:33,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:33,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113816034] [2022-01-18 15:17:33,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113816034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:33,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305505632] [2022-01-18 15:17:33,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:33,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:33,479 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:33,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 15:17:33,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:17:33,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:33,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:33,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:17:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:33,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:34,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:34,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:34,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305505632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:34,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:34,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:34,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225477852] [2022-01-18 15:17:34,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:34,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:34,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:34,183 INFO L87 Difference]: Start difference. First operand 386 states and 1192 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:34,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:34,599 INFO L93 Difference]: Finished difference Result 494 states and 1475 transitions. [2022-01-18 15:17:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:34,599 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:34,600 INFO L225 Difference]: With dead ends: 494 [2022-01-18 15:17:34,600 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 15:17:34,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:34,600 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 93 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:34,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 187 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 15:17:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 394. [2022-01-18 15:17:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.1119592875318065) internal successors, (1223), 393 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1223 transitions. [2022-01-18 15:17:34,605 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1223 transitions. Word has length 20 [2022-01-18 15:17:34,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:34,605 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1223 transitions. [2022-01-18 15:17:34,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1223 transitions. [2022-01-18 15:17:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:34,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:34,606 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:34,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-01-18 15:17:34,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:34,806 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:34,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1716373446, now seen corresponding path program 193 times [2022-01-18 15:17:34,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:34,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163720174] [2022-01-18 15:17:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:34,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:34,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:34,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163720174] [2022-01-18 15:17:34,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163720174] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:34,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856331347] [2022-01-18 15:17:34,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:34,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:34,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:34,896 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:34,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 15:17:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:35,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:35,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:35,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:17:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:35,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:35,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:35,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:35,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856331347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:35,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:35,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:17:35,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823627757] [2022-01-18 15:17:35,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:35,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:35,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:35,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:35,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:35,568 INFO L87 Difference]: Start difference. First operand 394 states and 1223 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:36,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:36,025 INFO L93 Difference]: Finished difference Result 500 states and 1482 transitions. [2022-01-18 15:17:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:17:36,025 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:36,026 INFO L225 Difference]: With dead ends: 500 [2022-01-18 15:17:36,026 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 15:17:36,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:36,026 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:36,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 191 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 15:17:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 391. [2022-01-18 15:17:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.1076923076923078) internal successors, (1212), 390 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:36,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1212 transitions. [2022-01-18 15:17:36,031 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1212 transitions. Word has length 20 [2022-01-18 15:17:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:36,031 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1212 transitions. [2022-01-18 15:17:36,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1212 transitions. [2022-01-18 15:17:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:36,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:36,031 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:36,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-18 15:17:36,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-01-18 15:17:36,232 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2043364048, now seen corresponding path program 194 times [2022-01-18 15:17:36,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:36,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964051660] [2022-01-18 15:17:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:36,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:36,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:36,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964051660] [2022-01-18 15:17:36,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964051660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:36,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567100500] [2022-01-18 15:17:36,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:36,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:36,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:36,304 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:36,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 15:17:36,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:36,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:36,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:36,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:36,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:17:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:36,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:36,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:36,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:36,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567100500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:36,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:36,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:17:36,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541389098] [2022-01-18 15:17:36,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:36,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:17:36,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:36,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:17:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:17:36,876 INFO L87 Difference]: Start difference. First operand 391 states and 1212 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:37,163 INFO L93 Difference]: Finished difference Result 464 states and 1400 transitions. [2022-01-18 15:17:37,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:37,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:37,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:37,164 INFO L225 Difference]: With dead ends: 464 [2022-01-18 15:17:37,164 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 15:17:37,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:37,164 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:37,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 130 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:17:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 15:17:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 388. [2022-01-18 15:17:37,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.103359173126615) internal successors, (1201), 387 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1201 transitions. [2022-01-18 15:17:37,168 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1201 transitions. Word has length 20 [2022-01-18 15:17:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:37,169 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1201 transitions. [2022-01-18 15:17:37,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1201 transitions. [2022-01-18 15:17:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:37,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:37,169 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:37,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-01-18 15:17:37,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:37,370 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1105470006, now seen corresponding path program 195 times [2022-01-18 15:17:37,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:37,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514943664] [2022-01-18 15:17:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:37,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:37,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:37,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514943664] [2022-01-18 15:17:37,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514943664] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:37,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113581958] [2022-01-18 15:17:37,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:37,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:37,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:37,467 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:37,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 15:17:37,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:17:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:37,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:37,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-01-18 15:17:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:37,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:38,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:38,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:38,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113581958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:38,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:38,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:38,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82318996] [2022-01-18 15:17:38,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:38,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:38,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:38,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:38,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:38,182 INFO L87 Difference]: Start difference. First operand 388 states and 1201 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:38,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:38,690 INFO L93 Difference]: Finished difference Result 581 states and 1693 transitions. [2022-01-18 15:17:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:38,690 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:38,691 INFO L225 Difference]: With dead ends: 581 [2022-01-18 15:17:38,691 INFO L226 Difference]: Without dead ends: 581 [2022-01-18 15:17:38,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:17:38,691 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 157 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:38,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 203 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-18 15:17:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 396. [2022-01-18 15:17:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.131645569620253) internal successors, (1237), 395 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1237 transitions. [2022-01-18 15:17:38,696 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1237 transitions. Word has length 20 [2022-01-18 15:17:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:38,696 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1237 transitions. [2022-01-18 15:17:38,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1237 transitions. [2022-01-18 15:17:38,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:38,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:38,697 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:38,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-01-18 15:17:38,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:38,897 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:38,897 INFO L85 PathProgramCache]: Analyzing trace with hash -223392572, now seen corresponding path program 196 times [2022-01-18 15:17:38,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:38,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417716570] [2022-01-18 15:17:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:38,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:38,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:38,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417716570] [2022-01-18 15:17:38,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417716570] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:38,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104177658] [2022-01-18 15:17:38,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:38,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:38,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:38,997 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:38,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 15:17:39,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:39,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:39,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:39,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:17:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:39,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:39,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:39,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:39,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104177658] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:39,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:39,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:17:39,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369886207] [2022-01-18 15:17:39,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:39,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:39,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:39,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:39,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:39,612 INFO L87 Difference]: Start difference. First operand 396 states and 1237 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:40,190 INFO L93 Difference]: Finished difference Result 610 states and 1739 transitions. [2022-01-18 15:17:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:17:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:40,191 INFO L225 Difference]: With dead ends: 610 [2022-01-18 15:17:40,191 INFO L226 Difference]: Without dead ends: 604 [2022-01-18 15:17:40,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:17:40,191 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 180 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:40,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 207 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-18 15:17:40,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 399. [2022-01-18 15:17:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.113065326633166) internal successors, (1239), 398 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1239 transitions. [2022-01-18 15:17:40,200 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1239 transitions. Word has length 20 [2022-01-18 15:17:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:40,200 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1239 transitions. [2022-01-18 15:17:40,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1239 transitions. [2022-01-18 15:17:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:40,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:40,201 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:40,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:40,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:40,413 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:40,413 INFO L85 PathProgramCache]: Analyzing trace with hash -364572672, now seen corresponding path program 197 times [2022-01-18 15:17:40,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:40,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699566145] [2022-01-18 15:17:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:40,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:40,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:40,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699566145] [2022-01-18 15:17:40,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699566145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:40,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294768675] [2022-01-18 15:17:40,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:40,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:40,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:40,516 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:40,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 15:17:40,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:17:40,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:40,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:40,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:40,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 83 [2022-01-18 15:17:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:40,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:41,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:41,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:41,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294768675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:41,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:41,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:41,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663660560] [2022-01-18 15:17:41,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:41,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:41,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:41,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:41,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:41,201 INFO L87 Difference]: Start difference. First operand 399 states and 1239 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:41,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:41,653 INFO L93 Difference]: Finished difference Result 549 states and 1614 transitions. [2022-01-18 15:17:41,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:41,653 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:41,654 INFO L225 Difference]: With dead ends: 549 [2022-01-18 15:17:41,654 INFO L226 Difference]: Without dead ends: 549 [2022-01-18 15:17:41,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:41,654 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:41,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 240 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:17:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-18 15:17:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 392. [2022-01-18 15:17:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.122762148337596) internal successors, (1221), 391 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1221 transitions. [2022-01-18 15:17:41,659 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1221 transitions. Word has length 20 [2022-01-18 15:17:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:41,659 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1221 transitions. [2022-01-18 15:17:41,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1221 transitions. [2022-01-18 15:17:41,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:41,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:41,659 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:41,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-01-18 15:17:41,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:41,860 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:41,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash 629802948, now seen corresponding path program 198 times [2022-01-18 15:17:41,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:41,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558707730] [2022-01-18 15:17:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:41,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:41,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:41,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558707730] [2022-01-18 15:17:41,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558707730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:41,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111254261] [2022-01-18 15:17:41,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:41,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:41,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:41,941 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:41,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 15:17:42,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:17:42,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:42,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:42,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:42,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:17:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:42,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:42,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:42,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:42,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111254261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:42,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:42,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:17:42,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164299928] [2022-01-18 15:17:42,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:42,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:17:42,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:17:42,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:42,674 INFO L87 Difference]: Start difference. First operand 392 states and 1221 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:43,057 INFO L93 Difference]: Finished difference Result 578 states and 1674 transitions. [2022-01-18 15:17:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:43,058 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:43,058 INFO L225 Difference]: With dead ends: 578 [2022-01-18 15:17:43,058 INFO L226 Difference]: Without dead ends: 578 [2022-01-18 15:17:43,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:43,059 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 126 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:43,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 169 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-18 15:17:43,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 389. [2022-01-18 15:17:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.1082474226804124) internal successors, (1206), 388 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1206 transitions. [2022-01-18 15:17:43,064 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1206 transitions. Word has length 20 [2022-01-18 15:17:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:43,064 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1206 transitions. [2022-01-18 15:17:43,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1206 transitions. [2022-01-18 15:17:43,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:43,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:43,064 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:43,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-01-18 15:17:43,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-01-18 15:17:43,265 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1610256080, now seen corresponding path program 199 times [2022-01-18 15:17:43,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:43,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788667616] [2022-01-18 15:17:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:43,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:43,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:43,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788667616] [2022-01-18 15:17:43,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788667616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:43,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466562166] [2022-01-18 15:17:43,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:43,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:43,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:43,366 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:43,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 15:17:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:43,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:43,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:43,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:17:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:43,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:43,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:43,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:44,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466562166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:44,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:44,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:17:44,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89327138] [2022-01-18 15:17:44,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:44,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:44,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:44,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:44,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:44,066 INFO L87 Difference]: Start difference. First operand 389 states and 1206 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:44,558 INFO L93 Difference]: Finished difference Result 549 states and 1606 transitions. [2022-01-18 15:17:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:17:44,558 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:44,559 INFO L225 Difference]: With dead ends: 549 [2022-01-18 15:17:44,559 INFO L226 Difference]: Without dead ends: 543 [2022-01-18 15:17:44,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:17:44,560 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 127 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:44,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 189 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-18 15:17:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 399. [2022-01-18 15:17:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0979899497487438) internal successors, (1233), 398 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1233 transitions. [2022-01-18 15:17:44,564 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1233 transitions. Word has length 20 [2022-01-18 15:17:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:44,564 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1233 transitions. [2022-01-18 15:17:44,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1233 transitions. [2022-01-18 15:17:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:44,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:44,565 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:44,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-01-18 15:17:44,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-01-18 15:17:44,765 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:44,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1634155994, now seen corresponding path program 200 times [2022-01-18 15:17:44,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:44,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843744751] [2022-01-18 15:17:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:44,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:44,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:44,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843744751] [2022-01-18 15:17:44,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843744751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:44,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326852351] [2022-01-18 15:17:44,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:44,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:44,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:44,870 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:44,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 15:17:44,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:44,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:44,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:44,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:45,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:17:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:45,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:45,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:45,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:45,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326852351] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:45,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:45,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:45,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844334800] [2022-01-18 15:17:45,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:45,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:45,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:45,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:45,552 INFO L87 Difference]: Start difference. First operand 399 states and 1233 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:46,025 INFO L93 Difference]: Finished difference Result 526 states and 1567 transitions. [2022-01-18 15:17:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:46,026 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:46,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:46,026 INFO L225 Difference]: With dead ends: 526 [2022-01-18 15:17:46,026 INFO L226 Difference]: Without dead ends: 526 [2022-01-18 15:17:46,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:17:46,027 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:46,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 192 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:46,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-18 15:17:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 388. [2022-01-18 15:17:46,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.103359173126615) internal successors, (1201), 387 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1201 transitions. [2022-01-18 15:17:46,031 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1201 transitions. Word has length 20 [2022-01-18 15:17:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:46,031 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1201 transitions. [2022-01-18 15:17:46,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1201 transitions. [2022-01-18 15:17:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:46,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:46,032 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:46,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-01-18 15:17:46,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-01-18 15:17:46,232 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1243069884, now seen corresponding path program 201 times [2022-01-18 15:17:46,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:46,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160194128] [2022-01-18 15:17:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:46,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:46,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:46,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160194128] [2022-01-18 15:17:46,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160194128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:46,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729572697] [2022-01-18 15:17:46,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:46,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:46,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:46,321 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:46,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 15:17:46,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:17:46,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:46,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:46,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:46,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:17:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:46,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:46,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:46,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:46,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729572697] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:46,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:46,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:17:46,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847163222] [2022-01-18 15:17:46,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:46,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:46,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:46,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:46,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:46,929 INFO L87 Difference]: Start difference. First operand 388 states and 1201 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:47,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:47,290 INFO L93 Difference]: Finished difference Result 466 states and 1404 transitions. [2022-01-18 15:17:47,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:47,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:47,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:47,291 INFO L225 Difference]: With dead ends: 466 [2022-01-18 15:17:47,291 INFO L226 Difference]: Without dead ends: 454 [2022-01-18 15:17:47,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:17:47,292 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:47,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 165 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:47,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-18 15:17:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 390. [2022-01-18 15:17:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1002570694087406) internal successors, (1206), 389 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1206 transitions. [2022-01-18 15:17:47,296 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1206 transitions. Word has length 20 [2022-01-18 15:17:47,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:47,296 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1206 transitions. [2022-01-18 15:17:47,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1206 transitions. [2022-01-18 15:17:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:47,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:47,297 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:47,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-01-18 15:17:47,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-01-18 15:17:47,497 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:47,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:47,497 INFO L85 PathProgramCache]: Analyzing trace with hash -502172550, now seen corresponding path program 202 times [2022-01-18 15:17:47,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:47,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584219342] [2022-01-18 15:17:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:47,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:47,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584219342] [2022-01-18 15:17:47,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584219342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010603227] [2022-01-18 15:17:47,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:47,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:47,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:47,574 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:47,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 15:17:47,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:47,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:47,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:47,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:47,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:17:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:47,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:48,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:48,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:48,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010603227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:48,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:48,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:17:48,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756495838] [2022-01-18 15:17:48,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:48,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:17:48,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:48,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:17:48,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:17:48,177 INFO L87 Difference]: Start difference. First operand 390 states and 1206 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:48,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:48,486 INFO L93 Difference]: Finished difference Result 491 states and 1456 transitions. [2022-01-18 15:17:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:48,487 INFO L225 Difference]: With dead ends: 491 [2022-01-18 15:17:48,487 INFO L226 Difference]: Without dead ends: 485 [2022-01-18 15:17:48,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:17:48,487 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:48,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 147 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:17:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-18 15:17:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 400. [2022-01-18 15:17:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0902255639097747) internal successors, (1233), 399 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1233 transitions. [2022-01-18 15:17:48,492 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1233 transitions. Word has length 20 [2022-01-18 15:17:48,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:48,492 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1233 transitions. [2022-01-18 15:17:48,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:48,492 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1233 transitions. [2022-01-18 15:17:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:48,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:48,493 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:48,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-01-18 15:17:48,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:48,709 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash -478272636, now seen corresponding path program 203 times [2022-01-18 15:17:48,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:48,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004037962] [2022-01-18 15:17:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:48,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:48,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:48,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004037962] [2022-01-18 15:17:48,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004037962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:48,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972965158] [2022-01-18 15:17:48,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:48,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:48,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:48,807 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:48,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 15:17:48,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:17:48,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:48,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:48,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:49,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:17:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:49,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:49,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:49,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:17:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:49,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972965158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:49,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:49,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:49,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021258695] [2022-01-18 15:17:49,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:49,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:49,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:49,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:49,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:49,478 INFO L87 Difference]: Start difference. First operand 400 states and 1233 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:49,796 INFO L93 Difference]: Finished difference Result 462 states and 1402 transitions. [2022-01-18 15:17:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:49,796 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:49,797 INFO L225 Difference]: With dead ends: 462 [2022-01-18 15:17:49,797 INFO L226 Difference]: Without dead ends: 462 [2022-01-18 15:17:49,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:17:49,797 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:49,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 141 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:49,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-18 15:17:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 387. [2022-01-18 15:17:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.098445595854922) internal successors, (1196), 386 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1196 transitions. [2022-01-18 15:17:49,801 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1196 transitions. Word has length 20 [2022-01-18 15:17:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:49,801 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1196 transitions. [2022-01-18 15:17:49,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:49,802 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1196 transitions. [2022-01-18 15:17:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:49,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:49,802 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:49,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-01-18 15:17:50,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-01-18 15:17:50,015 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:50,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1741936860, now seen corresponding path program 204 times [2022-01-18 15:17:50,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:50,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572833933] [2022-01-18 15:17:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:50,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:50,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:50,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572833933] [2022-01-18 15:17:50,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572833933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:50,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718458688] [2022-01-18 15:17:50,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:50,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:50,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:50,113 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:50,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 15:17:50,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:17:50,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:50,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:50,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:50,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:17:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:50,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:50,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:50,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:17:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:50,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718458688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:50,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:50,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:50,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199712598] [2022-01-18 15:17:50,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:50,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:50,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:50,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:50,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:50,719 INFO L87 Difference]: Start difference. First operand 387 states and 1196 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:51,076 INFO L93 Difference]: Finished difference Result 536 states and 1595 transitions. [2022-01-18 15:17:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:51,077 INFO L225 Difference]: With dead ends: 536 [2022-01-18 15:17:51,078 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 15:17:51,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:51,078 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 121 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:51,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 171 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:51,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 15:17:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 397. [2022-01-18 15:17:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.1338383838383836) internal successors, (1241), 396 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1241 transitions. [2022-01-18 15:17:51,082 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1241 transitions. Word has length 20 [2022-01-18 15:17:51,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:51,083 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1241 transitions. [2022-01-18 15:17:51,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1241 transitions. [2022-01-18 15:17:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:51,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:51,083 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:51,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:51,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-01-18 15:17:51,284 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash -859859426, now seen corresponding path program 205 times [2022-01-18 15:17:51,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:51,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782408513] [2022-01-18 15:17:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:51,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:51,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782408513] [2022-01-18 15:17:51,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782408513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282074287] [2022-01-18 15:17:51,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:51,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:51,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:51,362 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:51,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 15:17:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:51,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:51,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:51,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:17:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:51,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:51,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:51,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:17:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:51,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282074287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:51,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:51,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:17:51,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969551125] [2022-01-18 15:17:51,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:51,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:17:51,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:51,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:17:51,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:17:51,987 INFO L87 Difference]: Start difference. First operand 397 states and 1241 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:52,330 INFO L93 Difference]: Finished difference Result 565 states and 1641 transitions. [2022-01-18 15:17:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:17:52,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:52,332 INFO L225 Difference]: With dead ends: 565 [2022-01-18 15:17:52,332 INFO L226 Difference]: Without dead ends: 559 [2022-01-18 15:17:52,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:17:52,332 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 118 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:52,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 199 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:52,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-18 15:17:52,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 400. [2022-01-18 15:17:52,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.1152882205513786) internal successors, (1243), 399 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1243 transitions. [2022-01-18 15:17:52,337 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1243 transitions. Word has length 20 [2022-01-18 15:17:52,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:52,337 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1243 transitions. [2022-01-18 15:17:52,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1243 transitions. [2022-01-18 15:17:52,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:52,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:52,337 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:52,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:52,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:52,538 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:52,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1001039526, now seen corresponding path program 206 times [2022-01-18 15:17:52,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:52,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070880495] [2022-01-18 15:17:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:52,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:52,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:52,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070880495] [2022-01-18 15:17:52,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070880495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:52,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756893633] [2022-01-18 15:17:52,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:52,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:52,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:52,649 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:52,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 15:17:52,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:52,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:52,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:52,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:52,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:17:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:53,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:53,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:53,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:17:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:53,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756893633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:53,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:53,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:53,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467331837] [2022-01-18 15:17:53,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:53,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:53,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:53,269 INFO L87 Difference]: Start difference. First operand 400 states and 1243 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:53,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:53,745 INFO L93 Difference]: Finished difference Result 594 states and 1738 transitions. [2022-01-18 15:17:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:53,746 INFO L225 Difference]: With dead ends: 594 [2022-01-18 15:17:53,746 INFO L226 Difference]: Without dead ends: 594 [2022-01-18 15:17:53,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:17:53,747 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 148 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:53,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 225 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-18 15:17:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2022-01-18 15:17:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.129353233830846) internal successors, (1258), 402 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1258 transitions. [2022-01-18 15:17:53,752 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1258 transitions. Word has length 20 [2022-01-18 15:17:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:53,752 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1258 transitions. [2022-01-18 15:17:53,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1258 transitions. [2022-01-18 15:17:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:53,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:53,753 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:53,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-01-18 15:17:53,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2022-01-18 15:17:53,953 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:53,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:53,953 INFO L85 PathProgramCache]: Analyzing trace with hash -6663906, now seen corresponding path program 207 times [2022-01-18 15:17:53,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:53,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962110105] [2022-01-18 15:17:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:53,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:54,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:54,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962110105] [2022-01-18 15:17:54,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962110105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:54,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044121111] [2022-01-18 15:17:54,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:54,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:54,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:54,067 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:54,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 15:17:54,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:17:54,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:54,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:54,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:17:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:54,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:54,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:54,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:17:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:54,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044121111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:54,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:54,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:54,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438249984] [2022-01-18 15:17:54,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:54,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:54,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:54,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:54,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:54,647 INFO L87 Difference]: Start difference. First operand 403 states and 1258 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:55,211 INFO L93 Difference]: Finished difference Result 623 states and 1798 transitions. [2022-01-18 15:17:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:17:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:55,212 INFO L225 Difference]: With dead ends: 623 [2022-01-18 15:17:55,212 INFO L226 Difference]: Without dead ends: 623 [2022-01-18 15:17:55,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:17:55,212 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 153 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:55,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 248 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-18 15:17:55,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 400. [2022-01-18 15:17:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.1152882205513786) internal successors, (1243), 399 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1243 transitions. [2022-01-18 15:17:55,217 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1243 transitions. Word has length 20 [2022-01-18 15:17:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:55,217 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1243 transitions. [2022-01-18 15:17:55,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1243 transitions. [2022-01-18 15:17:55,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:55,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:55,218 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:55,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-01-18 15:17:55,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:55,418 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:55,419 INFO L85 PathProgramCache]: Analyzing trace with hash 973789226, now seen corresponding path program 208 times [2022-01-18 15:17:55,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:55,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204833439] [2022-01-18 15:17:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:55,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:55,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:55,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204833439] [2022-01-18 15:17:55,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204833439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:55,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955601943] [2022-01-18 15:17:55,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:55,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:55,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:55,496 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:55,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 15:17:55,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:55,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:55,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:55,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:55,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:17:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:55,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:55,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:55,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:17:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:56,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955601943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:56,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:56,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:17:56,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508642486] [2022-01-18 15:17:56,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:56,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:17:56,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:56,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:17:56,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:17:56,037 INFO L87 Difference]: Start difference. First operand 400 states and 1243 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:56,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:56,417 INFO L93 Difference]: Finished difference Result 582 states and 1690 transitions. [2022-01-18 15:17:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:56,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:56,418 INFO L225 Difference]: With dead ends: 582 [2022-01-18 15:17:56,418 INFO L226 Difference]: Without dead ends: 576 [2022-01-18 15:17:56,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:17:56,418 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 104 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:56,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 203 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:56,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-18 15:17:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 404. [2022-01-18 15:17:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.119106699751861) internal successors, (1257), 403 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1257 transitions. [2022-01-18 15:17:56,423 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1257 transitions. Word has length 20 [2022-01-18 15:17:56,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:56,423 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1257 transitions. [2022-01-18 15:17:56,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:56,423 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1257 transitions. [2022-01-18 15:17:56,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:56,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:56,430 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:56,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-01-18 15:17:56,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-01-18 15:17:56,635 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:56,636 INFO L85 PathProgramCache]: Analyzing trace with hash 997689140, now seen corresponding path program 209 times [2022-01-18 15:17:56,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:56,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954090474] [2022-01-18 15:17:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:56,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:56,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:56,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954090474] [2022-01-18 15:17:56,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954090474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:56,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745413970] [2022-01-18 15:17:56,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:56,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:56,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:56,735 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:56,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 15:17:56,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:17:56,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:56,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:56,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:57,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:17:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:57,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:57,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:57,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:17:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:57,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745413970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:57,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:57,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:57,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939733737] [2022-01-18 15:17:57,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:57,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:57,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:57,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:57,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:57,328 INFO L87 Difference]: Start difference. First operand 404 states and 1257 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:57,770 INFO L93 Difference]: Finished difference Result 565 states and 1672 transitions. [2022-01-18 15:17:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:57,770 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:57,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:57,771 INFO L225 Difference]: With dead ends: 565 [2022-01-18 15:17:57,771 INFO L226 Difference]: Without dead ends: 565 [2022-01-18 15:17:57,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:17:57,771 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 102 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:57,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 261 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:17:57,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-18 15:17:57,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 401. [2022-01-18 15:17:57,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.1175) internal successors, (1247), 400 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1247 transitions. [2022-01-18 15:17:57,776 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1247 transitions. Word has length 20 [2022-01-18 15:17:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:57,776 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1247 transitions. [2022-01-18 15:17:57,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1247 transitions. [2022-01-18 15:17:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:57,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:57,777 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:57,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:57,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-01-18 15:17:57,977 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:57,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:57,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2026470592, now seen corresponding path program 210 times [2022-01-18 15:17:57,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:57,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207209915] [2022-01-18 15:17:57,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:57,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:58,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:58,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207209915] [2022-01-18 15:17:58,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207209915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:58,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219562743] [2022-01-18 15:17:58,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:58,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:58,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:58,072 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:58,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 15:17:58,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:17:58,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:58,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:58,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:58,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-01-18 15:17:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:58,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:58,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:58,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:17:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:58,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219562743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:58,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:58,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:58,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763167915] [2022-01-18 15:17:58,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:58,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:58,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:58,689 INFO L87 Difference]: Start difference. First operand 401 states and 1247 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:59,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:59,016 INFO L93 Difference]: Finished difference Result 518 states and 1556 transitions. [2022-01-18 15:17:59,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:59,016 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:17:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:59,017 INFO L225 Difference]: With dead ends: 518 [2022-01-18 15:17:59,017 INFO L226 Difference]: Without dead ends: 518 [2022-01-18 15:17:59,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:59,017 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 119 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:59,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 124 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:17:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-18 15:17:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 402. [2022-01-18 15:17:59,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.114713216957606) internal successors, (1249), 401 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1249 transitions. [2022-01-18 15:17:59,022 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1249 transitions. Word has length 20 [2022-01-18 15:17:59,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:59,022 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1249 transitions. [2022-01-18 15:17:59,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1249 transitions. [2022-01-18 15:17:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:17:59,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:59,022 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:59,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-01-18 15:17:59,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-01-18 15:17:59,223 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:59,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1274121084, now seen corresponding path program 211 times [2022-01-18 15:17:59,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:59,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280872415] [2022-01-18 15:17:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:59,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:59,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:59,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280872415] [2022-01-18 15:17:59,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280872415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:59,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482871495] [2022-01-18 15:17:59,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:59,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:59,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:59,322 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:59,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 15:17:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:59,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:59,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:59,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-01-18 15:17:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:59,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:59,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:59,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:17:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:59,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482871495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:59,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:59,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:17:59,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854260978] [2022-01-18 15:17:59,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:59,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:59,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:59,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:59,943 INFO L87 Difference]: Start difference. First operand 402 states and 1249 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:00,375 INFO L93 Difference]: Finished difference Result 539 states and 1594 transitions. [2022-01-18 15:18:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:00,375 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:00,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:00,376 INFO L225 Difference]: With dead ends: 539 [2022-01-18 15:18:00,376 INFO L226 Difference]: Without dead ends: 539 [2022-01-18 15:18:00,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:18:00,376 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 152 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:00,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 170 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-18 15:18:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 391. [2022-01-18 15:18:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.1076923076923078) internal successors, (1212), 390 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1212 transitions. [2022-01-18 15:18:00,381 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1212 transitions. Word has length 20 [2022-01-18 15:18:00,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:00,381 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1212 transitions. [2022-01-18 15:18:00,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1212 transitions. [2022-01-18 15:18:00,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:00,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:00,381 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:00,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:00,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-01-18 15:18:00,582 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:00,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:00,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1569548266, now seen corresponding path program 212 times [2022-01-18 15:18:00,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:00,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082893854] [2022-01-18 15:18:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:00,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:00,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:00,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082893854] [2022-01-18 15:18:00,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082893854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:00,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999662889] [2022-01-18 15:18:00,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:00,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:00,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:00,667 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:00,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 15:18:00,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:00,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:00,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:00,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:01,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:01,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:01,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:01,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999662889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:01,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:01,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:18:01,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056548649] [2022-01-18 15:18:01,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:01,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:18:01,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:01,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:18:01,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:18:01,209 INFO L87 Difference]: Start difference. First operand 391 states and 1212 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:01,522 INFO L93 Difference]: Finished difference Result 461 states and 1401 transitions. [2022-01-18 15:18:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:01,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:01,523 INFO L225 Difference]: With dead ends: 461 [2022-01-18 15:18:01,523 INFO L226 Difference]: Without dead ends: 461 [2022-01-18 15:18:01,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:01,523 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:01,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 152 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-18 15:18:01,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 388. [2022-01-18 15:18:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.10077519379845) internal successors, (1200), 387 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1200 transitions. [2022-01-18 15:18:01,527 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1200 transitions. Word has length 20 [2022-01-18 15:18:01,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:01,527 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1200 transitions. [2022-01-18 15:18:01,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:01,527 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1200 transitions. [2022-01-18 15:18:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:01,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:01,528 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:01,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-01-18 15:18:01,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-18 15:18:01,728 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:01,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:01,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1888870714, now seen corresponding path program 213 times [2022-01-18 15:18:01,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:01,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973673352] [2022-01-18 15:18:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:01,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:01,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:01,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973673352] [2022-01-18 15:18:01,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973673352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:01,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311809491] [2022-01-18 15:18:01,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:01,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:01,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:01,803 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:01,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 15:18:01,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:18:01,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:01,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:01,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:02,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:02,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:02,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:02,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:02,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311809491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:02,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:02,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:18:02,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784200847] [2022-01-18 15:18:02,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:02,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:18:02,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:18:02,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:18:02,301 INFO L87 Difference]: Start difference. First operand 388 states and 1200 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:02,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:02,562 INFO L93 Difference]: Finished difference Result 506 states and 1495 transitions. [2022-01-18 15:18:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:02,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:02,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:02,563 INFO L225 Difference]: With dead ends: 506 [2022-01-18 15:18:02,563 INFO L226 Difference]: Without dead ends: 500 [2022-01-18 15:18:02,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:02,563 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:02,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 140 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:02,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-01-18 15:18:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 402. [2022-01-18 15:18:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.089775561097257) internal successors, (1239), 401 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1239 transitions. [2022-01-18 15:18:02,568 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1239 transitions. Word has length 20 [2022-01-18 15:18:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:02,568 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1239 transitions. [2022-01-18 15:18:02,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1239 transitions. [2022-01-18 15:18:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:02,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:02,568 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:02,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-01-18 15:18:02,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-01-18 15:18:02,769 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:02,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:02,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1912770628, now seen corresponding path program 214 times [2022-01-18 15:18:02,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:02,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747060718] [2022-01-18 15:18:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:02,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:02,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:02,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747060718] [2022-01-18 15:18:02,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747060718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:02,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878126461] [2022-01-18 15:18:02,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:02,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:02,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:02,869 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:02,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 15:18:02,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:02,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:02,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:02,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:03,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:03,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:03,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:03,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:03,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878126461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:03,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:03,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:18:03,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874979951] [2022-01-18 15:18:03,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:03,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:03,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:03,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:03,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:03,417 INFO L87 Difference]: Start difference. First operand 402 states and 1239 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:03,760 INFO L93 Difference]: Finished difference Result 512 states and 1516 transitions. [2022-01-18 15:18:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:18:03,760 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:03,761 INFO L225 Difference]: With dead ends: 512 [2022-01-18 15:18:03,761 INFO L226 Difference]: Without dead ends: 512 [2022-01-18 15:18:03,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:03,761 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:03,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 220 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-18 15:18:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 400. [2022-01-18 15:18:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.092731829573935) internal successors, (1234), 399 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1234 transitions. [2022-01-18 15:18:03,766 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1234 transitions. Word has length 20 [2022-01-18 15:18:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:03,766 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1234 transitions. [2022-01-18 15:18:03,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1234 transitions. [2022-01-18 15:18:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:03,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:03,767 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:03,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:03,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:03,967 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:03,967 INFO L85 PathProgramCache]: Analyzing trace with hash -899061730, now seen corresponding path program 215 times [2022-01-18 15:18:03,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:03,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800815548] [2022-01-18 15:18:03,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:03,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:04,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:04,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800815548] [2022-01-18 15:18:04,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800815548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:04,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239608728] [2022-01-18 15:18:04,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:04,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:04,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:04,047 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:04,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 15:18:04,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:18:04,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:04,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:04,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:04,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:04,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:04,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:04,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239608728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:04,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:04,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:18:04,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506411717] [2022-01-18 15:18:04,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:04,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:18:04,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:18:04,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:18:04,537 INFO L87 Difference]: Start difference. First operand 400 states and 1234 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:04,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:04,800 INFO L93 Difference]: Finished difference Result 481 states and 1451 transitions. [2022-01-18 15:18:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:04,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:04,801 INFO L225 Difference]: With dead ends: 481 [2022-01-18 15:18:04,801 INFO L226 Difference]: Without dead ends: 481 [2022-01-18 15:18:04,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:04,801 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:04,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 105 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:04,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-18 15:18:04,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 387. [2022-01-18 15:18:04,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.098445595854922) internal successors, (1196), 386 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:04,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1196 transitions. [2022-01-18 15:18:04,805 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1196 transitions. Word has length 20 [2022-01-18 15:18:04,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:04,805 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1196 transitions. [2022-01-18 15:18:04,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1196 transitions. [2022-01-18 15:18:04,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:04,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:04,806 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:04,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-01-18 15:18:05,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:05,015 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:05,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:05,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1354652468, now seen corresponding path program 216 times [2022-01-18 15:18:05,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:05,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812202995] [2022-01-18 15:18:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:05,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:05,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:05,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812202995] [2022-01-18 15:18:05,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812202995] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:05,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623415081] [2022-01-18 15:18:05,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:05,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:05,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:05,091 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:05,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 15:18:05,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:18:05,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:05,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:05,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:05,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:05,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:05,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:05,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:05,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623415081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:05,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:05,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:05,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911799045] [2022-01-18 15:18:05,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:05,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:05,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:05,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:05,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:05,603 INFO L87 Difference]: Start difference. First operand 387 states and 1196 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:05,828 INFO L93 Difference]: Finished difference Result 455 states and 1372 transitions. [2022-01-18 15:18:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:05,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:05,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:05,829 INFO L225 Difference]: With dead ends: 455 [2022-01-18 15:18:05,829 INFO L226 Difference]: Without dead ends: 443 [2022-01-18 15:18:05,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:18:05,829 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:05,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 109 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:05,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-18 15:18:05,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 391. [2022-01-18 15:18:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.0923076923076924) internal successors, (1206), 390 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1206 transitions. [2022-01-18 15:18:05,833 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1206 transitions. Word has length 20 [2022-01-18 15:18:05,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:05,833 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1206 transitions. [2022-01-18 15:18:05,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:05,833 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1206 transitions. [2022-01-18 15:18:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:05,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:05,834 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:05,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-01-18 15:18:06,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-01-18 15:18:06,034 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2095549802, now seen corresponding path program 217 times [2022-01-18 15:18:06,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:06,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612834896] [2022-01-18 15:18:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:06,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:06,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:06,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612834896] [2022-01-18 15:18:06,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612834896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:06,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112902345] [2022-01-18 15:18:06,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:06,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:06,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:06,110 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:06,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 15:18:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:06,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:06,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:18:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:06,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:06,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:06,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:06,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112902345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:06,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:06,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:18:06,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430993978] [2022-01-18 15:18:06,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:06,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:18:06,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:06,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:18:06,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:18:06,615 INFO L87 Difference]: Start difference. First operand 391 states and 1206 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:06,862 INFO L93 Difference]: Finished difference Result 480 states and 1424 transitions. [2022-01-18 15:18:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:06,862 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:06,863 INFO L225 Difference]: With dead ends: 480 [2022-01-18 15:18:06,863 INFO L226 Difference]: Without dead ends: 474 [2022-01-18 15:18:06,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:06,863 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:06,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 175 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-18 15:18:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 401. [2022-01-18 15:18:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0825) internal successors, (1233), 400 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1233 transitions. [2022-01-18 15:18:06,867 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1233 transitions. Word has length 20 [2022-01-18 15:18:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:06,867 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1233 transitions. [2022-01-18 15:18:06,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1233 transitions. [2022-01-18 15:18:06,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:06,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:06,868 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:06,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-01-18 15:18:07,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:07,068 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:07,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:07,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2119449716, now seen corresponding path program 218 times [2022-01-18 15:18:07,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:07,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740676720] [2022-01-18 15:18:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:07,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:07,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740676720] [2022-01-18 15:18:07,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740676720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626205773] [2022-01-18 15:18:07,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:07,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:07,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:07,156 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:07,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 15:18:07,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:07,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:07,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:07,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:07,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:18:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:07,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:07,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:07,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:07,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626205773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:07,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:07,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:07,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578717408] [2022-01-18 15:18:07,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:07,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:07,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:07,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:07,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:07,668 INFO L87 Difference]: Start difference. First operand 401 states and 1233 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:07,900 INFO L93 Difference]: Finished difference Result 451 states and 1370 transitions. [2022-01-18 15:18:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:07,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:07,901 INFO L225 Difference]: With dead ends: 451 [2022-01-18 15:18:07,901 INFO L226 Difference]: Without dead ends: 451 [2022-01-18 15:18:07,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:18:07,901 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:07,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 124 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-18 15:18:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 389. [2022-01-18 15:18:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.095360824742268) internal successors, (1201), 388 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1201 transitions. [2022-01-18 15:18:07,905 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1201 transitions. Word has length 20 [2022-01-18 15:18:07,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:07,906 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1201 transitions. [2022-01-18 15:18:07,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:07,906 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1201 transitions. [2022-01-18 15:18:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:07,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:07,906 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:07,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:08,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-01-18 15:18:08,107 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:08,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:08,107 INFO L85 PathProgramCache]: Analyzing trace with hash 828092624, now seen corresponding path program 219 times [2022-01-18 15:18:08,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:08,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661218962] [2022-01-18 15:18:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:08,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:08,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:08,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661218962] [2022-01-18 15:18:08,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661218962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:08,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157397167] [2022-01-18 15:18:08,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:08,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:08,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:08,173 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:08,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 15:18:08,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:18:08,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:08,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:08,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:08,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:08,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:08,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:08,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:08,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157397167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:08,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:08,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:18:08,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525245707] [2022-01-18 15:18:08,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:08,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:18:08,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:08,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:18:08,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:18:08,616 INFO L87 Difference]: Start difference. First operand 389 states and 1201 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:08,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:08,836 INFO L93 Difference]: Finished difference Result 486 states and 1439 transitions. [2022-01-18 15:18:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:08,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:08,837 INFO L225 Difference]: With dead ends: 486 [2022-01-18 15:18:08,837 INFO L226 Difference]: Without dead ends: 480 [2022-01-18 15:18:08,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:08,837 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:08,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 127 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-18 15:18:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 403. [2022-01-18 15:18:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.084577114427861) internal successors, (1240), 402 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1240 transitions. [2022-01-18 15:18:08,841 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1240 transitions. Word has length 20 [2022-01-18 15:18:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:08,841 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1240 transitions. [2022-01-18 15:18:08,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1240 transitions. [2022-01-18 15:18:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:08,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:08,842 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:08,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-01-18 15:18:09,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:09,042 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:09,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:09,043 INFO L85 PathProgramCache]: Analyzing trace with hash 851992538, now seen corresponding path program 220 times [2022-01-18 15:18:09,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:09,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426119216] [2022-01-18 15:18:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:09,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:09,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:09,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426119216] [2022-01-18 15:18:09,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426119216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:09,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349410508] [2022-01-18 15:18:09,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:09,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:09,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:09,145 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:09,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 15:18:09,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:09,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:09,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:09,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:09,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:09,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:09,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:09,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349410508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:09,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:09,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:18:09,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30492072] [2022-01-18 15:18:09,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:09,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:09,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:09,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:09,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:09,626 INFO L87 Difference]: Start difference. First operand 403 states and 1240 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:09,923 INFO L93 Difference]: Finished difference Result 486 states and 1445 transitions. [2022-01-18 15:18:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:18:09,924 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:09,924 INFO L225 Difference]: With dead ends: 486 [2022-01-18 15:18:09,924 INFO L226 Difference]: Without dead ends: 486 [2022-01-18 15:18:09,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:09,925 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:09,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 171 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-01-18 15:18:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 401. [2022-01-18 15:18:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0875) internal successors, (1235), 400 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1235 transitions. [2022-01-18 15:18:09,929 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1235 transitions. Word has length 20 [2022-01-18 15:18:09,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:09,929 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1235 transitions. [2022-01-18 15:18:09,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1235 transitions. [2022-01-18 15:18:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:09,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:09,930 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:09,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-01-18 15:18:10,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-01-18 15:18:10,130 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1959839820, now seen corresponding path program 221 times [2022-01-18 15:18:10,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:10,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958799825] [2022-01-18 15:18:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:10,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:10,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:10,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958799825] [2022-01-18 15:18:10,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958799825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:10,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23309865] [2022-01-18 15:18:10,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:10,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:10,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:10,197 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:10,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 15:18:10,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:18:10,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:10,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:10,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:10,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:10,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23309865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:10,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:10,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:18:10,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075247966] [2022-01-18 15:18:10,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:10,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:18:10,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:18:10,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:18:10,590 INFO L87 Difference]: Start difference. First operand 401 states and 1235 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:10,851 INFO L93 Difference]: Finished difference Result 461 states and 1395 transitions. [2022-01-18 15:18:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:10,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:10,852 INFO L225 Difference]: With dead ends: 461 [2022-01-18 15:18:10,852 INFO L226 Difference]: Without dead ends: 461 [2022-01-18 15:18:10,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:10,852 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:10,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 137 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:10,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-18 15:18:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 386. [2022-01-18 15:18:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.0961038961038962) internal successors, (1192), 385 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1192 transitions. [2022-01-18 15:18:10,856 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1192 transitions. Word has length 20 [2022-01-18 15:18:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:10,856 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1192 transitions. [2022-01-18 15:18:10,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1192 transitions. [2022-01-18 15:18:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:10,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:10,857 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:10,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-01-18 15:18:11,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-01-18 15:18:11,057 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:11,057 INFO L85 PathProgramCache]: Analyzing trace with hash -617145956, now seen corresponding path program 222 times [2022-01-18 15:18:11,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:11,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717995338] [2022-01-18 15:18:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:11,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:11,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:11,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717995338] [2022-01-18 15:18:11,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717995338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:11,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082119304] [2022-01-18 15:18:11,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:11,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:11,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:11,123 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:11,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 15:18:11,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:18:11,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:11,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:11,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:11,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:11,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:11,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:11,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082119304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:11,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:11,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-18 15:18:11,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349376262] [2022-01-18 15:18:11,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:11,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:18:11,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:11,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:18:11,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:18:11,534 INFO L87 Difference]: Start difference. First operand 386 states and 1192 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:11,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:11,801 INFO L93 Difference]: Finished difference Result 519 states and 1530 transitions. [2022-01-18 15:18:11,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:11,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:11,802 INFO L225 Difference]: With dead ends: 519 [2022-01-18 15:18:11,802 INFO L226 Difference]: Without dead ends: 501 [2022-01-18 15:18:11,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:11,802 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 90 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:11,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 158 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-18 15:18:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 390. [2022-01-18 15:18:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.089974293059126) internal successors, (1202), 389 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1202 transitions. [2022-01-18 15:18:11,807 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1202 transitions. Word has length 20 [2022-01-18 15:18:11,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:11,807 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1202 transitions. [2022-01-18 15:18:11,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1202 transitions. [2022-01-18 15:18:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:11,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:11,807 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:11,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:12,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-01-18 15:18:12,023 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:12,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash 972724420, now seen corresponding path program 223 times [2022-01-18 15:18:12,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:12,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313842469] [2022-01-18 15:18:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:12,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:12,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:12,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313842469] [2022-01-18 15:18:12,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313842469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:12,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187108491] [2022-01-18 15:18:12,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:12,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:12,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:12,082 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:12,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 15:18:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:12,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:12,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:12,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:12,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:12,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:12,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187108491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:12,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:12,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:18:12,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178719019] [2022-01-18 15:18:12,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:12,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:18:12,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:18:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:18:12,510 INFO L87 Difference]: Start difference. First operand 390 states and 1202 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:12,693 INFO L93 Difference]: Finished difference Result 515 states and 1522 transitions. [2022-01-18 15:18:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:12,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:12,694 INFO L225 Difference]: With dead ends: 515 [2022-01-18 15:18:12,694 INFO L226 Difference]: Without dead ends: 503 [2022-01-18 15:18:12,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:12,694 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:12,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 137 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:12,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-18 15:18:12,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 392. [2022-01-18 15:18:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0869565217391304) internal successors, (1207), 391 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1207 transitions. [2022-01-18 15:18:12,699 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1207 transitions. Word has length 20 [2022-01-18 15:18:12,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:12,699 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1207 transitions. [2022-01-18 15:18:12,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1207 transitions. [2022-01-18 15:18:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:12,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:12,700 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:12,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-01-18 15:18:12,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-01-18 15:18:12,912 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1713621754, now seen corresponding path program 224 times [2022-01-18 15:18:12,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:12,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936176935] [2022-01-18 15:18:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:12,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:12,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:12,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936176935] [2022-01-18 15:18:12,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936176935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:12,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103266969] [2022-01-18 15:18:12,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:12,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:12,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:12,993 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:12,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 15:18:13,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:13,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:13,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:13,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:13,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:18:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:13,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:13,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:13,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:13,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103266969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:13,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:13,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:18:13,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612532028] [2022-01-18 15:18:13,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:13,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:18:13,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:13,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:18:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:18:13,503 INFO L87 Difference]: Start difference. First operand 392 states and 1207 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:13,917 INFO L93 Difference]: Finished difference Result 540 states and 1574 transitions. [2022-01-18 15:18:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:13,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:13,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:13,918 INFO L225 Difference]: With dead ends: 540 [2022-01-18 15:18:13,918 INFO L226 Difference]: Without dead ends: 534 [2022-01-18 15:18:13,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:13,918 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 128 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:13,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 164 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:13,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-18 15:18:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 402. [2022-01-18 15:18:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.0773067331670823) internal successors, (1234), 401 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1234 transitions. [2022-01-18 15:18:13,923 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1234 transitions. Word has length 20 [2022-01-18 15:18:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:13,923 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1234 transitions. [2022-01-18 15:18:13,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1234 transitions. [2022-01-18 15:18:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:13,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:13,924 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:13,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-01-18 15:18:14,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:14,127 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:14,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1737521668, now seen corresponding path program 225 times [2022-01-18 15:18:14,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:14,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86044717] [2022-01-18 15:18:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:14,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:14,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:14,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86044717] [2022-01-18 15:18:14,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86044717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:14,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122808055] [2022-01-18 15:18:14,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:14,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:14,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:14,192 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:14,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 15:18:14,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:18:14,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:14,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:14,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:14,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:18:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:14,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:14,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:14,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:14,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122808055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:14,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:14,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:18:14,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622471778] [2022-01-18 15:18:14,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:14,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:18:14,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:14,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:18:14,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:18:14,674 INFO L87 Difference]: Start difference. First operand 402 states and 1234 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:14,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:14,856 INFO L93 Difference]: Finished difference Result 511 states and 1520 transitions. [2022-01-18 15:18:14,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:14,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:14,857 INFO L225 Difference]: With dead ends: 511 [2022-01-18 15:18:14,857 INFO L226 Difference]: Without dead ends: 511 [2022-01-18 15:18:14,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:14,857 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 82 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:14,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 113 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-18 15:18:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 388. [2022-01-18 15:18:14,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.0930232558139537) internal successors, (1197), 387 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1197 transitions. [2022-01-18 15:18:14,862 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1197 transitions. Word has length 20 [2022-01-18 15:18:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:14,862 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1197 transitions. [2022-01-18 15:18:14,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:14,862 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1197 transitions. [2022-01-18 15:18:14,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:14,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:14,862 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:14,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-01-18 15:18:15,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:15,063 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:15,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash 548413184, now seen corresponding path program 226 times [2022-01-18 15:18:15,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:15,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728771923] [2022-01-18 15:18:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:15,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:15,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:15,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728771923] [2022-01-18 15:18:15,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728771923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:15,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234064371] [2022-01-18 15:18:15,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:15,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:15,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:15,142 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:15,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 15:18:15,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:15,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:15,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:15,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:15,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:15,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:15,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:15,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:15,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234064371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:15,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:15,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-18 15:18:15,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443003601] [2022-01-18 15:18:15,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:15,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:18:15,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:15,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:18:15,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:18:15,622 INFO L87 Difference]: Start difference. First operand 388 states and 1197 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:15,842 INFO L93 Difference]: Finished difference Result 452 states and 1363 transitions. [2022-01-18 15:18:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:15,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:15,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:15,843 INFO L225 Difference]: With dead ends: 452 [2022-01-18 15:18:15,843 INFO L226 Difference]: Without dead ends: 440 [2022-01-18 15:18:15,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:15,843 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:15,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 126 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:15,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-18 15:18:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 392. [2022-01-18 15:18:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0869565217391304) internal successors, (1207), 391 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1207 transitions. [2022-01-18 15:18:15,847 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1207 transitions. Word has length 20 [2022-01-18 15:18:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:15,847 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1207 transitions. [2022-01-18 15:18:15,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1207 transitions. [2022-01-18 15:18:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:15,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:15,848 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:15,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-01-18 15:18:16,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-01-18 15:18:16,048 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:16,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:16,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1289310518, now seen corresponding path program 227 times [2022-01-18 15:18:16,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:16,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768921217] [2022-01-18 15:18:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:16,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:16,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768921217] [2022-01-18 15:18:16,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768921217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377873587] [2022-01-18 15:18:16,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:16,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:16,109 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:16,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 15:18:16,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:16,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:16,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:16,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:16,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:18:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:16,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:16,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:16,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:16,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377873587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:16,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:16,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:18:16,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924146393] [2022-01-18 15:18:16,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:16,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:18:16,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:16,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:18:16,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:18:16,600 INFO L87 Difference]: Start difference. First operand 392 states and 1207 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:16,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:16,811 INFO L93 Difference]: Finished difference Result 477 states and 1415 transitions. [2022-01-18 15:18:16,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:16,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:16,812 INFO L225 Difference]: With dead ends: 477 [2022-01-18 15:18:16,812 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 15:18:16,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:16,812 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:16,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 148 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 15:18:16,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 402. [2022-01-18 15:18:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.0773067331670823) internal successors, (1234), 401 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1234 transitions. [2022-01-18 15:18:16,817 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1234 transitions. Word has length 20 [2022-01-18 15:18:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:16,817 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1234 transitions. [2022-01-18 15:18:16,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1234 transitions. [2022-01-18 15:18:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:16,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:16,817 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:16,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-01-18 15:18:17,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-01-18 15:18:17,018 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1313210432, now seen corresponding path program 228 times [2022-01-18 15:18:17,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:17,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669690875] [2022-01-18 15:18:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:17,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:17,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:17,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669690875] [2022-01-18 15:18:17,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669690875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:17,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12557974] [2022-01-18 15:18:17,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:17,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:17,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:17,099 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:17,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 15:18:17,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:18:17,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:17,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:17,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:17,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:18:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:17,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:17,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:17,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:17,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12557974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:17,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:17,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:18:17,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757248421] [2022-01-18 15:18:17,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:17,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:18:17,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:17,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:18:17,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:18:17,585 INFO L87 Difference]: Start difference. First operand 402 states and 1234 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:17,786 INFO L93 Difference]: Finished difference Result 448 states and 1361 transitions. [2022-01-18 15:18:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:17,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:17,787 INFO L225 Difference]: With dead ends: 448 [2022-01-18 15:18:17,787 INFO L226 Difference]: Without dead ends: 448 [2022-01-18 15:18:17,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:17,788 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:17,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 119 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-18 15:18:17,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 390. [2022-01-18 15:18:17,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.089974293059126) internal successors, (1202), 389 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1202 transitions. [2022-01-18 15:18:17,792 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1202 transitions. Word has length 20 [2022-01-18 15:18:17,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:17,792 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1202 transitions. [2022-01-18 15:18:17,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1202 transitions. [2022-01-18 15:18:17,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:17,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:17,792 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:17,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-01-18 15:18:17,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:17,993 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:17,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash 21853340, now seen corresponding path program 229 times [2022-01-18 15:18:17,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:17,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744373790] [2022-01-18 15:18:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:17,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:18,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744373790] [2022-01-18 15:18:18,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744373790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83031450] [2022-01-18 15:18:18,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:18,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:18,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:18,058 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:18,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-18 15:18:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:18,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:18,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:18,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:18,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:18,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:18,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:18,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83031450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:18,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:18,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:18:18,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710940151] [2022-01-18 15:18:18,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:18,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:18:18,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:18,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:18:18,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:18:18,467 INFO L87 Difference]: Start difference. First operand 390 states and 1202 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:18,649 INFO L93 Difference]: Finished difference Result 481 states and 1425 transitions. [2022-01-18 15:18:18,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:18,649 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:18,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:18,650 INFO L225 Difference]: With dead ends: 481 [2022-01-18 15:18:18,650 INFO L226 Difference]: Without dead ends: 475 [2022-01-18 15:18:18,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:18,650 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:18,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 122 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-18 15:18:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 404. [2022-01-18 15:18:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.0794044665012406) internal successors, (1241), 403 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1241 transitions. [2022-01-18 15:18:18,655 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1241 transitions. Word has length 20 [2022-01-18 15:18:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:18,655 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1241 transitions. [2022-01-18 15:18:18,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1241 transitions. [2022-01-18 15:18:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:18,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:18,655 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:18,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:18,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:18,856 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:18,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:18,856 INFO L85 PathProgramCache]: Analyzing trace with hash 45753254, now seen corresponding path program 230 times [2022-01-18 15:18:18,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:18,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118228986] [2022-01-18 15:18:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:18,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:18,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:18,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118228986] [2022-01-18 15:18:18,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118228986] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:18,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981578652] [2022-01-18 15:18:18,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:18,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:18,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:18,942 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:18,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-18 15:18:19,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:19,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:19,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:19,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:19,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:19,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:19,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:19,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:19,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981578652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:19,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:19,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:19,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668447558] [2022-01-18 15:18:19,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:19,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:19,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:19,396 INFO L87 Difference]: Start difference. First operand 404 states and 1241 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:19,657 INFO L93 Difference]: Finished difference Result 481 states and 1431 transitions. [2022-01-18 15:18:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:18:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:19,658 INFO L225 Difference]: With dead ends: 481 [2022-01-18 15:18:19,658 INFO L226 Difference]: Without dead ends: 481 [2022-01-18 15:18:19,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:18:19,658 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 86 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:19,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 187 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-18 15:18:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 402. [2022-01-18 15:18:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.082294264339152) internal successors, (1236), 401 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1236 transitions. [2022-01-18 15:18:19,663 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1236 transitions. Word has length 20 [2022-01-18 15:18:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:19,663 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1236 transitions. [2022-01-18 15:18:19,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1236 transitions. [2022-01-18 15:18:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:19,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:19,663 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:19,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-01-18 15:18:19,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:19,864 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:19,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1528888192, now seen corresponding path program 231 times [2022-01-18 15:18:19,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:19,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976599530] [2022-01-18 15:18:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:19,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:19,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:19,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976599530] [2022-01-18 15:18:19,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976599530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:19,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914956072] [2022-01-18 15:18:19,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:19,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:19,924 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:19,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-18 15:18:20,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:18:20,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:20,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:20,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:20,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:20,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:20,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:20,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914956072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:20,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:20,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:18:20,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915538108] [2022-01-18 15:18:20,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:20,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:18:20,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:20,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:18:20,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:18:20,305 INFO L87 Difference]: Start difference. First operand 402 states and 1236 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:20,474 INFO L93 Difference]: Finished difference Result 456 states and 1381 transitions. [2022-01-18 15:18:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:20,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:20,475 INFO L225 Difference]: With dead ends: 456 [2022-01-18 15:18:20,475 INFO L226 Difference]: Without dead ends: 456 [2022-01-18 15:18:20,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:20,475 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:20,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 84 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:18:20,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-18 15:18:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 388. [2022-01-18 15:18:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.0930232558139537) internal successors, (1197), 387 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1197 transitions. [2022-01-18 15:18:20,479 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1197 transitions. Word has length 20 [2022-01-18 15:18:20,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:20,479 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1197 transitions. [2022-01-18 15:18:20,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1197 transitions. [2022-01-18 15:18:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:20,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:20,480 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:20,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-01-18 15:18:20,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-01-18 15:18:20,680 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:20,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:20,680 INFO L85 PathProgramCache]: Analyzing trace with hash -586696698, now seen corresponding path program 232 times [2022-01-18 15:18:20,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:20,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804915123] [2022-01-18 15:18:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:20,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:20,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:20,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804915123] [2022-01-18 15:18:20,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804915123] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:20,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347869453] [2022-01-18 15:18:20,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:20,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:20,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:20,769 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:20,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-18 15:18:20,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:20,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:20,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:20,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:21,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:21,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:21,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:21,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:21,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347869453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:21,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:21,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:21,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358212092] [2022-01-18 15:18:21,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:21,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:21,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:21,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:21,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:21,197 INFO L87 Difference]: Start difference. First operand 388 states and 1197 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:21,468 INFO L93 Difference]: Finished difference Result 494 states and 1476 transitions. [2022-01-18 15:18:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:21,468 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:21,469 INFO L225 Difference]: With dead ends: 494 [2022-01-18 15:18:21,469 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 15:18:21,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:21,469 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 110 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:21,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 183 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 15:18:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 398. [2022-01-18 15:18:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.0806045340050376) internal successors, (1223), 397 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:21,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1223 transitions. [2022-01-18 15:18:21,474 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1223 transitions. Word has length 20 [2022-01-18 15:18:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:21,474 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1223 transitions. [2022-01-18 15:18:21,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1223 transitions. [2022-01-18 15:18:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:21,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:21,474 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:21,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-01-18 15:18:21,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-01-18 15:18:21,675 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:21,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1438185292, now seen corresponding path program 233 times [2022-01-18 15:18:21,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:21,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249442621] [2022-01-18 15:18:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:21,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:21,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:21,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249442621] [2022-01-18 15:18:21,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249442621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:21,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826174148] [2022-01-18 15:18:21,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:21,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:21,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:21,752 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:21,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-18 15:18:21,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:21,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:21,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:21,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:21,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:22,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:22,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:22,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:22,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826174148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:22,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:22,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:22,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922358435] [2022-01-18 15:18:22,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:22,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:22,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:22,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:22,222 INFO L87 Difference]: Start difference. First operand 398 states and 1223 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:22,540 INFO L93 Difference]: Finished difference Result 546 states and 1597 transitions. [2022-01-18 15:18:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:22,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:22,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:22,541 INFO L225 Difference]: With dead ends: 546 [2022-01-18 15:18:22,541 INFO L226 Difference]: Without dead ends: 546 [2022-01-18 15:18:22,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:22,541 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:22,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 243 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-18 15:18:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 401. [2022-01-18 15:18:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.085) internal successors, (1234), 400 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1234 transitions. [2022-01-18 15:18:22,546 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1234 transitions. Word has length 20 [2022-01-18 15:18:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:22,546 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1234 transitions. [2022-01-18 15:18:22,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1234 transitions. [2022-01-18 15:18:22,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:22,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:22,547 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:22,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-01-18 15:18:22,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:22,747 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:22,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:22,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1974704570, now seen corresponding path program 234 times [2022-01-18 15:18:22,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:22,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252182371] [2022-01-18 15:18:22,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:22,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:22,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:22,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252182371] [2022-01-18 15:18:22,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252182371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:22,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72210354] [2022-01-18 15:18:22,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:22,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:22,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:22,855 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:22,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-18 15:18:22,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:18:22,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:22,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:22,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:23,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:23,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:23,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:23,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:23,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72210354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:23,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:23,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:18:23,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53847803] [2022-01-18 15:18:23,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:23,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:18:23,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:23,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:18:23,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:18:23,308 INFO L87 Difference]: Start difference. First operand 401 states and 1234 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:23,593 INFO L93 Difference]: Finished difference Result 503 states and 1494 transitions. [2022-01-18 15:18:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:23,594 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:23,594 INFO L225 Difference]: With dead ends: 503 [2022-01-18 15:18:23,594 INFO L226 Difference]: Without dead ends: 497 [2022-01-18 15:18:23,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:23,595 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:23,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 192 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-18 15:18:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 393. [2022-01-18 15:18:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.086734693877551) internal successors, (1210), 392 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1210 transitions. [2022-01-18 15:18:23,599 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1210 transitions. Word has length 20 [2022-01-18 15:18:23,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:23,599 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1210 transitions. [2022-01-18 15:18:23,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1210 transitions. [2022-01-18 15:18:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:23,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:23,600 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:23,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-01-18 15:18:23,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-01-18 15:18:23,800 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:23,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:23,800 INFO L85 PathProgramCache]: Analyzing trace with hash 931839026, now seen corresponding path program 235 times [2022-01-18 15:18:23,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:23,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756068388] [2022-01-18 15:18:23,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:23,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:23,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:23,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756068388] [2022-01-18 15:18:23,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756068388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:23,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046096711] [2022-01-18 15:18:23,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:23,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:23,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:23,883 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:23,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-18 15:18:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:24,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:24,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:24,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:18:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:24,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:24,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:24,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:24,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046096711] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:24,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:24,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:24,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113391641] [2022-01-18 15:18:24,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:24,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:24,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:24,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:24,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:24,421 INFO L87 Difference]: Start difference. First operand 393 states and 1210 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:24,691 INFO L93 Difference]: Finished difference Result 472 states and 1410 transitions. [2022-01-18 15:18:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:24,691 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:24,692 INFO L225 Difference]: With dead ends: 472 [2022-01-18 15:18:24,692 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 15:18:24,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:24,692 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 113 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:24,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 143 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 15:18:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 399. [2022-01-18 15:18:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0954773869346734) internal successors, (1232), 398 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1232 transitions. [2022-01-18 15:18:24,696 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1232 transitions. Word has length 20 [2022-01-18 15:18:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:24,696 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1232 transitions. [2022-01-18 15:18:24,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:24,696 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1232 transitions. [2022-01-18 15:18:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:24,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:24,697 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:24,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-01-18 15:18:24,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-01-18 15:18:24,897 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:24,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1813916460, now seen corresponding path program 236 times [2022-01-18 15:18:24,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:24,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637984848] [2022-01-18 15:18:24,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:24,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:24,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:24,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637984848] [2022-01-18 15:18:24,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637984848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:24,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362376019] [2022-01-18 15:18:24,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:24,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:24,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:25,000 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:25,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-18 15:18:25,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:25,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:25,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:25,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:25,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:18:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:25,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:25,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:25,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:25,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362376019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:25,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:25,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:25,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199529560] [2022-01-18 15:18:25,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:25,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:25,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:25,495 INFO L87 Difference]: Start difference. First operand 399 states and 1232 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:25,858 INFO L93 Difference]: Finished difference Result 478 states and 1417 transitions. [2022-01-18 15:18:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:18:25,859 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:25,859 INFO L225 Difference]: With dead ends: 478 [2022-01-18 15:18:25,859 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 15:18:25,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:18:25,860 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 83 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:25,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 193 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 15:18:25,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 396. [2022-01-18 15:18:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.091139240506329) internal successors, (1221), 395 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1221 transitions. [2022-01-18 15:18:25,864 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1221 transitions. Word has length 20 [2022-01-18 15:18:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:25,864 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1221 transitions. [2022-01-18 15:18:25,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1221 transitions. [2022-01-18 15:18:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:25,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:25,864 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:25,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-01-18 15:18:26,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-01-18 15:18:26,065 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:26,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:26,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1278686658, now seen corresponding path program 237 times [2022-01-18 15:18:26,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:26,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922489402] [2022-01-18 15:18:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:26,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:26,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:26,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922489402] [2022-01-18 15:18:26,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922489402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:26,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791261626] [2022-01-18 15:18:26,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:26,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:26,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:26,151 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:26,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-18 15:18:26,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:18:26,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:26,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:26,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:26,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:26,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:26,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:26,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:26,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791261626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:26,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:26,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:26,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120701207] [2022-01-18 15:18:26,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:26,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:26,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:26,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:26,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:26,638 INFO L87 Difference]: Start difference. First operand 396 states and 1221 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:26,981 INFO L93 Difference]: Finished difference Result 436 states and 1322 transitions. [2022-01-18 15:18:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:26,981 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:26,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:26,982 INFO L225 Difference]: With dead ends: 436 [2022-01-18 15:18:26,982 INFO L226 Difference]: Without dead ends: 424 [2022-01-18 15:18:26,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:26,982 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:26,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 169 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:26,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-18 15:18:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 388. [2022-01-18 15:18:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.0930232558139537) internal successors, (1197), 387 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1197 transitions. [2022-01-18 15:18:26,986 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1197 transitions. Word has length 20 [2022-01-18 15:18:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:26,986 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1197 transitions. [2022-01-18 15:18:26,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1197 transitions. [2022-01-18 15:18:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:26,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:26,987 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:27,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-01-18 15:18:27,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-01-18 15:18:27,187 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1460726889, now seen corresponding path program 238 times [2022-01-18 15:18:27,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:27,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032791217] [2022-01-18 15:18:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:27,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:27,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:27,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032791217] [2022-01-18 15:18:27,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032791217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:27,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765095272] [2022-01-18 15:18:27,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:27,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:27,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:27,238 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:27,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-18 15:18:27,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:27,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:27,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:27,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:27,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:18:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:27,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:27,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:27,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:27,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765095272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:27,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:27,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 15:18:27,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868109322] [2022-01-18 15:18:27,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:27,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:18:27,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:27,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:18:27,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:18:27,645 INFO L87 Difference]: Start difference. First operand 388 states and 1197 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:27,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:27,893 INFO L93 Difference]: Finished difference Result 523 states and 1575 transitions. [2022-01-18 15:18:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:27,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:27,894 INFO L225 Difference]: With dead ends: 523 [2022-01-18 15:18:27,894 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 15:18:27,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:27,894 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 92 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:27,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 194 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 15:18:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 383. [2022-01-18 15:18:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.081151832460733) internal successors, (1177), 382 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1177 transitions. [2022-01-18 15:18:27,898 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1177 transitions. Word has length 20 [2022-01-18 15:18:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:27,898 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1177 transitions. [2022-01-18 15:18:27,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:27,898 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1177 transitions. [2022-01-18 15:18:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:27,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:27,898 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:27,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-01-18 15:18:28,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:28,099 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:28,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1548929860, now seen corresponding path program 239 times [2022-01-18 15:18:28,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:28,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325245629] [2022-01-18 15:18:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:28,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:28,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:28,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325245629] [2022-01-18 15:18:28,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325245629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:28,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326971672] [2022-01-18 15:18:28,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:28,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:28,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:28,187 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:28,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-18 15:18:28,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:28,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:28,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:28,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:28,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:18:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:28,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:28,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:28,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:28,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326971672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:28,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:28,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:28,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853802978] [2022-01-18 15:18:28,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:28,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:28,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:28,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:28,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:28,658 INFO L87 Difference]: Start difference. First operand 383 states and 1177 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:29,028 INFO L93 Difference]: Finished difference Result 626 states and 1822 transitions. [2022-01-18 15:18:29,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:29,028 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:29,029 INFO L225 Difference]: With dead ends: 626 [2022-01-18 15:18:29,029 INFO L226 Difference]: Without dead ends: 626 [2022-01-18 15:18:29,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:29,030 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 164 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:29,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 239 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:29,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-18 15:18:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 395. [2022-01-18 15:18:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0913705583756346) internal successors, (1218), 394 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1218 transitions. [2022-01-18 15:18:29,034 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1218 transitions. Word has length 20 [2022-01-18 15:18:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:29,034 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1218 transitions. [2022-01-18 15:18:29,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1218 transitions. [2022-01-18 15:18:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:29,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:29,035 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:29,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-01-18 15:18:29,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:29,235 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:29,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:29,236 INFO L85 PathProgramCache]: Analyzing trace with hash 475952130, now seen corresponding path program 240 times [2022-01-18 15:18:29,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:29,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228782527] [2022-01-18 15:18:29,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:29,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:29,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:29,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228782527] [2022-01-18 15:18:29,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228782527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:29,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370026308] [2022-01-18 15:18:29,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:29,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:29,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:29,321 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:29,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-18 15:18:29,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:18:29,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:29,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:18:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:29,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:29,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:29,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:29,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370026308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:29,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:29,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:29,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140563633] [2022-01-18 15:18:29,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:29,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:29,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:29,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:29,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:29,822 INFO L87 Difference]: Start difference. First operand 395 states and 1218 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:30,125 INFO L93 Difference]: Finished difference Result 678 states and 1943 transitions. [2022-01-18 15:18:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:30,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:30,126 INFO L225 Difference]: With dead ends: 678 [2022-01-18 15:18:30,126 INFO L226 Difference]: Without dead ends: 678 [2022-01-18 15:18:30,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:30,126 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:30,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 240 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-18 15:18:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 401. [2022-01-18 15:18:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.1075) internal successors, (1243), 400 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1243 transitions. [2022-01-18 15:18:30,131 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1243 transitions. Word has length 20 [2022-01-18 15:18:30,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:30,131 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1243 transitions. [2022-01-18 15:18:30,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1243 transitions. [2022-01-18 15:18:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:30,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:30,132 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:30,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-01-18 15:18:30,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable241 [2022-01-18 15:18:30,332 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1358029564, now seen corresponding path program 241 times [2022-01-18 15:18:30,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:30,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944718379] [2022-01-18 15:18:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:30,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:30,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:30,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944718379] [2022-01-18 15:18:30,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944718379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:30,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452426823] [2022-01-18 15:18:30,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:30,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:30,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:30,414 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:30,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-18 15:18:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:30,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:30,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:30,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:18:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:30,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:30,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:30,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:30,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452426823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:30,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:30,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:18:30,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008980814] [2022-01-18 15:18:30,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:30,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:18:30,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:18:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:18:30,901 INFO L87 Difference]: Start difference. First operand 401 states and 1243 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:31,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:31,180 INFO L93 Difference]: Finished difference Result 635 states and 1834 transitions. [2022-01-18 15:18:31,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:31,180 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:31,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:31,181 INFO L225 Difference]: With dead ends: 635 [2022-01-18 15:18:31,181 INFO L226 Difference]: Without dead ends: 629 [2022-01-18 15:18:31,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:31,182 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:31,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 217 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:31,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-18 15:18:31,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 399. [2022-01-18 15:18:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0954773869346734) internal successors, (1232), 398 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1232 transitions. [2022-01-18 15:18:31,186 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1232 transitions. Word has length 20 [2022-01-18 15:18:31,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:31,186 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1232 transitions. [2022-01-18 15:18:31,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:31,186 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1232 transitions. [2022-01-18 15:18:31,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:31,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:31,187 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:31,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-01-18 15:18:31,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:31,387 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:31,388 INFO L85 PathProgramCache]: Analyzing trace with hash 824260035, now seen corresponding path program 242 times [2022-01-18 15:18:31,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:31,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114902340] [2022-01-18 15:18:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:31,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:31,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:31,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114902340] [2022-01-18 15:18:31,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114902340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:31,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53821723] [2022-01-18 15:18:31,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:31,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:31,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:31,464 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:31,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-18 15:18:31,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:31,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:31,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:31,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:31,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:31,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:31,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:31,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53821723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:31,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:31,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 15:18:31,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520397639] [2022-01-18 15:18:31,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:31,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:18:31,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:31,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:18:31,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:18:31,909 INFO L87 Difference]: Start difference. First operand 399 states and 1232 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:32,186 INFO L93 Difference]: Finished difference Result 601 states and 1793 transitions. [2022-01-18 15:18:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:32,187 INFO L225 Difference]: With dead ends: 601 [2022-01-18 15:18:32,187 INFO L226 Difference]: Without dead ends: 549 [2022-01-18 15:18:32,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:32,188 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:32,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 211 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-18 15:18:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 402. [2022-01-18 15:18:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.109725685785536) internal successors, (1247), 401 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1247 transitions. [2022-01-18 15:18:32,192 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1247 transitions. Word has length 20 [2022-01-18 15:18:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:32,192 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1247 transitions. [2022-01-18 15:18:32,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1247 transitions. [2022-01-18 15:18:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:32,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:32,193 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:32,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-01-18 15:18:32,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:32,393 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:32,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:32,394 INFO L85 PathProgramCache]: Analyzing trace with hash -55948986, now seen corresponding path program 243 times [2022-01-18 15:18:32,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:32,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151520131] [2022-01-18 15:18:32,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:32,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:32,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:32,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151520131] [2022-01-18 15:18:32,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151520131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:32,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101934924] [2022-01-18 15:18:32,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:32,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:32,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:32,491 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:32,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-18 15:18:32,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:18:32,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:32,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:32,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:32,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:18:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:32,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:32,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:32,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:32,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101934924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:32,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:32,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:32,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080834710] [2022-01-18 15:18:32,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:32,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:32,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:32,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:32,996 INFO L87 Difference]: Start difference. First operand 402 states and 1247 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:33,290 INFO L93 Difference]: Finished difference Result 589 states and 1730 transitions. [2022-01-18 15:18:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:33,291 INFO L225 Difference]: With dead ends: 589 [2022-01-18 15:18:33,291 INFO L226 Difference]: Without dead ends: 589 [2022-01-18 15:18:33,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:33,291 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 131 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:33,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 233 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-18 15:18:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 388. [2022-01-18 15:18:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1059431524547803) internal successors, (1202), 387 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1202 transitions. [2022-01-18 15:18:33,296 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1202 transitions. Word has length 20 [2022-01-18 15:18:33,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:33,296 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1202 transitions. [2022-01-18 15:18:33,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1202 transitions. [2022-01-18 15:18:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:33,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:33,297 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:33,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-01-18 15:18:33,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:33,497 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:33,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1155209474, now seen corresponding path program 244 times [2022-01-18 15:18:33,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:33,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771792122] [2022-01-18 15:18:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:33,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:33,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:33,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771792122] [2022-01-18 15:18:33,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771792122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:33,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519147130] [2022-01-18 15:18:33,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:33,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:33,595 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:33,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-18 15:18:33,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:33,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:33,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:18:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:33,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:34,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:34,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:34,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519147130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:34,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:34,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:34,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902403788] [2022-01-18 15:18:34,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:34,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:34,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:34,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:34,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:34,128 INFO L87 Difference]: Start difference. First operand 388 states and 1202 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:34,551 INFO L93 Difference]: Finished difference Result 585 states and 1714 transitions. [2022-01-18 15:18:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:34,552 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:34,553 INFO L225 Difference]: With dead ends: 585 [2022-01-18 15:18:34,553 INFO L226 Difference]: Without dead ends: 585 [2022-01-18 15:18:34,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:34,553 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 190 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:34,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 281 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:18:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-01-18 15:18:34,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 395. [2022-01-18 15:18:34,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.1243654822335025) internal successors, (1231), 394 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1231 transitions. [2022-01-18 15:18:34,558 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1231 transitions. Word has length 20 [2022-01-18 15:18:34,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:34,558 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1231 transitions. [2022-01-18 15:18:34,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:34,558 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1231 transitions. [2022-01-18 15:18:34,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:34,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:34,558 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:34,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-01-18 15:18:34,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-01-18 15:18:34,774 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:34,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1865602968, now seen corresponding path program 245 times [2022-01-18 15:18:34,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:34,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363087791] [2022-01-18 15:18:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:34,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:34,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:34,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363087791] [2022-01-18 15:18:34,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363087791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:34,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525559026] [2022-01-18 15:18:34,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:34,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:34,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:34,874 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:34,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-18 15:18:35,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:18:35,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:35,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:35,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:35,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:18:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:35,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:35,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:35,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:35,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525559026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:35,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:35,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:35,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832992540] [2022-01-18 15:18:35,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:35,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:35,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:35,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:35,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:35,388 INFO L87 Difference]: Start difference. First operand 395 states and 1231 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:35,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:35,661 INFO L93 Difference]: Finished difference Result 523 states and 1571 transitions. [2022-01-18 15:18:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:35,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:35,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:35,662 INFO L225 Difference]: With dead ends: 523 [2022-01-18 15:18:35,662 INFO L226 Difference]: Without dead ends: 523 [2022-01-18 15:18:35,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:35,662 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 121 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:35,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 203 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-18 15:18:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 386. [2022-01-18 15:18:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.0961038961038962) internal successors, (1192), 385 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1192 transitions. [2022-01-18 15:18:35,667 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1192 transitions. Word has length 20 [2022-01-18 15:18:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:35,667 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1192 transitions. [2022-01-18 15:18:35,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:35,667 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1192 transitions. [2022-01-18 15:18:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:35,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:35,667 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:35,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-01-18 15:18:35,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-01-18 15:18:35,868 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:35,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1811751647, now seen corresponding path program 246 times [2022-01-18 15:18:35,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:35,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600684437] [2022-01-18 15:18:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:35,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:35,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:35,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600684437] [2022-01-18 15:18:35,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600684437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:35,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889220987] [2022-01-18 15:18:35,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:35,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:35,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:35,919 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:35,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-18 15:18:36,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:18:36,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:36,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:36,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:36,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:36,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:36,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:18:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:36,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889220987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:36,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:36,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 15:18:36,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892896768] [2022-01-18 15:18:36,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:36,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:18:36,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:36,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:18:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:18:36,336 INFO L87 Difference]: Start difference. First operand 386 states and 1192 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:36,574 INFO L93 Difference]: Finished difference Result 502 states and 1499 transitions. [2022-01-18 15:18:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:36,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:36,575 INFO L225 Difference]: With dead ends: 502 [2022-01-18 15:18:36,575 INFO L226 Difference]: Without dead ends: 440 [2022-01-18 15:18:36,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:36,576 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:36,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 162 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-18 15:18:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 380. [2022-01-18 15:18:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.0686015831134563) internal successors, (1163), 379 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1163 transitions. [2022-01-18 15:18:36,579 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1163 transitions. Word has length 20 [2022-01-18 15:18:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:36,579 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1163 transitions. [2022-01-18 15:18:36,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1163 transitions. [2022-01-18 15:18:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:36,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:36,580 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:36,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-01-18 15:18:36,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:36,780 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1678264498, now seen corresponding path program 247 times [2022-01-18 15:18:36,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:36,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764815591] [2022-01-18 15:18:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:36,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:36,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:36,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764815591] [2022-01-18 15:18:36,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764815591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:36,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495147025] [2022-01-18 15:18:36,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:36,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:36,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:36,874 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:36,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-18 15:18:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:37,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:37,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:18:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:37,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:37,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:37,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:37,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495147025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:37,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:37,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:37,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571117248] [2022-01-18 15:18:37,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:37,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:37,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:37,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:37,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:37,393 INFO L87 Difference]: Start difference. First operand 380 states and 1163 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:37,694 INFO L93 Difference]: Finished difference Result 623 states and 1825 transitions. [2022-01-18 15:18:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:37,695 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:37,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:37,696 INFO L225 Difference]: With dead ends: 623 [2022-01-18 15:18:37,696 INFO L226 Difference]: Without dead ends: 623 [2022-01-18 15:18:37,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:18:37,696 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 133 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:37,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 210 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:37,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-18 15:18:37,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 388. [2022-01-18 15:18:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.098191214470284) internal successors, (1199), 387 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1199 transitions. [2022-01-18 15:18:37,701 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1199 transitions. Word has length 20 [2022-01-18 15:18:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:37,701 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1199 transitions. [2022-01-18 15:18:37,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1199 transitions. [2022-01-18 15:18:37,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:37,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:37,702 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:37,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-01-18 15:18:37,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:37,902 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:37,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:37,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1734625364, now seen corresponding path program 248 times [2022-01-18 15:18:37,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:37,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922787716] [2022-01-18 15:18:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:37,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:37,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:37,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922787716] [2022-01-18 15:18:37,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922787716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:37,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428073799] [2022-01-18 15:18:37,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:37,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:37,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:37,994 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:37,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-18 15:18:38,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:38,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:38,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:38,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:38,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:18:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:38,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:38,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:38,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:38,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428073799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:38,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:38,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:38,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914694918] [2022-01-18 15:18:38,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:38,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:38,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:38,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:38,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:38,527 INFO L87 Difference]: Start difference. First operand 388 states and 1199 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:38,820 INFO L93 Difference]: Finished difference Result 609 states and 1774 transitions. [2022-01-18 15:18:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:38,820 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:38,821 INFO L225 Difference]: With dead ends: 609 [2022-01-18 15:18:38,821 INFO L226 Difference]: Without dead ends: 603 [2022-01-18 15:18:38,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:38,822 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:38,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 214 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-18 15:18:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 391. [2022-01-18 15:18:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.0794871794871796) internal successors, (1201), 390 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1201 transitions. [2022-01-18 15:18:38,827 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1201 transitions. Word has length 20 [2022-01-18 15:18:38,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:38,827 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1201 transitions. [2022-01-18 15:18:38,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:38,827 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1201 transitions. [2022-01-18 15:18:38,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:38,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:38,827 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:38,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-01-18 15:18:39,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-01-18 15:18:39,035 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1875805464, now seen corresponding path program 249 times [2022-01-18 15:18:39,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:39,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207954483] [2022-01-18 15:18:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:39,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:39,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:39,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207954483] [2022-01-18 15:18:39,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207954483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:39,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453395809] [2022-01-18 15:18:39,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:39,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:39,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:39,138 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:39,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-18 15:18:39,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:18:39,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:39,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:39,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:39,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:18:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:39,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:39,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:39,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:39,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453395809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:39,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:39,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:39,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771675730] [2022-01-18 15:18:39,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:39,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:39,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:39,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:39,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:39,674 INFO L87 Difference]: Start difference. First operand 391 states and 1201 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:40,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:40,135 INFO L93 Difference]: Finished difference Result 654 states and 1889 transitions. [2022-01-18 15:18:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:40,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:40,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:40,136 INFO L225 Difference]: With dead ends: 654 [2022-01-18 15:18:40,136 INFO L226 Difference]: Without dead ends: 654 [2022-01-18 15:18:40,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:40,136 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 164 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:40,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 282 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:18:40,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-18 15:18:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 384. [2022-01-18 15:18:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.088772845953003) internal successors, (1183), 383 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1183 transitions. [2022-01-18 15:18:40,143 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1183 transitions. Word has length 20 [2022-01-18 15:18:40,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:40,143 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1183 transitions. [2022-01-18 15:18:40,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1183 transitions. [2022-01-18 15:18:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:40,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:40,143 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:40,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-01-18 15:18:40,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:40,344 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:40,344 INFO L85 PathProgramCache]: Analyzing trace with hash -881429844, now seen corresponding path program 250 times [2022-01-18 15:18:40,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:40,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508817605] [2022-01-18 15:18:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:40,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:40,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:40,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508817605] [2022-01-18 15:18:40,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508817605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:40,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813141954] [2022-01-18 15:18:40,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:40,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:40,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:40,447 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:40,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-18 15:18:40,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:40,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:40,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:40,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:18:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:40,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:40,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:40,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:41,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813141954] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:41,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:41,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:41,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510563514] [2022-01-18 15:18:41,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:41,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:41,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:41,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:41,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:41,001 INFO L87 Difference]: Start difference. First operand 384 states and 1183 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:41,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:41,288 INFO L93 Difference]: Finished difference Result 588 states and 1741 transitions. [2022-01-18 15:18:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:41,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:41,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:41,289 INFO L225 Difference]: With dead ends: 588 [2022-01-18 15:18:41,289 INFO L226 Difference]: Without dead ends: 588 [2022-01-18 15:18:41,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:18:41,289 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 129 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:41,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 192 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-18 15:18:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 381. [2022-01-18 15:18:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.0736842105263156) internal successors, (1168), 380 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1168 transitions. [2022-01-18 15:18:41,294 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1168 transitions. Word has length 20 [2022-01-18 15:18:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:41,294 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1168 transitions. [2022-01-18 15:18:41,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1168 transitions. [2022-01-18 15:18:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:41,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:41,294 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:41,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:41,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:41,495 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:41,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:41,495 INFO L85 PathProgramCache]: Analyzing trace with hash 99023288, now seen corresponding path program 251 times [2022-01-18 15:18:41,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:41,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755428976] [2022-01-18 15:18:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:41,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:41,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755428976] [2022-01-18 15:18:41,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755428976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232978345] [2022-01-18 15:18:41,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:41,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:41,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:41,587 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:41,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-18 15:18:41,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:41,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:41,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:41,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:41,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:18:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:41,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:42,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:42,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:42,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232978345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:42,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:42,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:42,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812174412] [2022-01-18 15:18:42,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:42,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:42,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:42,104 INFO L87 Difference]: Start difference. First operand 381 states and 1168 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:42,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:42,425 INFO L93 Difference]: Finished difference Result 560 states and 1643 transitions. [2022-01-18 15:18:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:42,425 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:42,426 INFO L225 Difference]: With dead ends: 560 [2022-01-18 15:18:42,426 INFO L226 Difference]: Without dead ends: 554 [2022-01-18 15:18:42,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:42,426 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 127 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:42,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 175 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-18 15:18:42,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 391. [2022-01-18 15:18:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.0641025641025643) internal successors, (1195), 390 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1195 transitions. [2022-01-18 15:18:42,431 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1195 transitions. Word has length 20 [2022-01-18 15:18:42,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:42,431 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1195 transitions. [2022-01-18 15:18:42,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:42,431 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1195 transitions. [2022-01-18 15:18:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:42,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:42,432 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:42,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:42,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:42,633 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:42,633 INFO L85 PathProgramCache]: Analyzing trace with hash 122923202, now seen corresponding path program 252 times [2022-01-18 15:18:42,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:42,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004213473] [2022-01-18 15:18:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:42,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:42,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:42,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004213473] [2022-01-18 15:18:42,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004213473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:42,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881693148] [2022-01-18 15:18:42,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:42,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:42,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:42,753 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:42,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-18 15:18:42,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:18:42,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:42,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:42,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:42,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:18:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:43,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:43,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:43,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:43,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881693148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:43,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:43,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:43,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285918231] [2022-01-18 15:18:43,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:43,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:43,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:43,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:43,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:43,282 INFO L87 Difference]: Start difference. First operand 391 states and 1195 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:43,541 INFO L93 Difference]: Finished difference Result 531 states and 1589 transitions. [2022-01-18 15:18:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:43,541 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:43,542 INFO L225 Difference]: With dead ends: 531 [2022-01-18 15:18:43,542 INFO L226 Difference]: Without dead ends: 531 [2022-01-18 15:18:43,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:18:43,542 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 110 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:43,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 165 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:43,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-18 15:18:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 378. [2022-01-18 15:18:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.0636604774535807) internal successors, (1155), 377 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:43,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1155 transitions. [2022-01-18 15:18:43,546 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1155 transitions. Word has length 20 [2022-01-18 15:18:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:43,546 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1155 transitions. [2022-01-18 15:18:43,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:43,547 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1155 transitions. [2022-01-18 15:18:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:43,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:43,547 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:43,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-01-18 15:18:43,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:43,747 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:43,748 INFO L85 PathProgramCache]: Analyzing trace with hash -451183230, now seen corresponding path program 253 times [2022-01-18 15:18:43,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:43,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520018425] [2022-01-18 15:18:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:43,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:43,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:43,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520018425] [2022-01-18 15:18:43,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520018425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:43,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563849465] [2022-01-18 15:18:43,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:43,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:43,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:43,848 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:43,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-18 15:18:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:44,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:44,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:18:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:44,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:44,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:44,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:44,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563849465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:44,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:44,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:44,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222984533] [2022-01-18 15:18:44,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:44,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:44,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:44,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:44,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:44,476 INFO L87 Difference]: Start difference. First operand 378 states and 1155 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:44,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:44,878 INFO L93 Difference]: Finished difference Result 452 states and 1343 transitions. [2022-01-18 15:18:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:44,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:44,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:44,878 INFO L225 Difference]: With dead ends: 452 [2022-01-18 15:18:44,879 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 15:18:44,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:44,879 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:44,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 156 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 15:18:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 385. [2022-01-18 15:18:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.078125) internal successors, (1182), 384 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1182 transitions. [2022-01-18 15:18:44,883 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1182 transitions. Word has length 20 [2022-01-18 15:18:44,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:44,883 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1182 transitions. [2022-01-18 15:18:44,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:44,883 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1182 transitions. [2022-01-18 15:18:44,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:44,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:44,883 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:44,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:45,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-01-18 15:18:45,088 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash 430894204, now seen corresponding path program 254 times [2022-01-18 15:18:45,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:45,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839814516] [2022-01-18 15:18:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:45,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:45,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:45,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839814516] [2022-01-18 15:18:45,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839814516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:45,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544479266] [2022-01-18 15:18:45,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:45,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:45,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:45,183 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:45,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-18 15:18:45,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:45,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:45,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:45,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:18:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:45,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:45,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:45,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:45,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544479266] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:45,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:45,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:45,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142711708] [2022-01-18 15:18:45,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:45,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:45,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:45,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:45,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:45,765 INFO L87 Difference]: Start difference. First operand 385 states and 1182 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:46,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:46,191 INFO L93 Difference]: Finished difference Result 458 states and 1350 transitions. [2022-01-18 15:18:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:18:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:46,193 INFO L225 Difference]: With dead ends: 458 [2022-01-18 15:18:46,193 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 15:18:46,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:18:46,194 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 115 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:46,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 183 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 15:18:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 382. [2022-01-18 15:18:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.073490813648294) internal successors, (1171), 381 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1171 transitions. [2022-01-18 15:18:46,198 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1171 transitions. Word has length 20 [2022-01-18 15:18:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:46,198 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1171 transitions. [2022-01-18 15:18:46,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1171 transitions. [2022-01-18 15:18:46,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:46,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:46,198 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:46,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:46,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-01-18 15:18:46,403 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:46,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash -104335598, now seen corresponding path program 255 times [2022-01-18 15:18:46,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:46,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812820722] [2022-01-18 15:18:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:46,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:46,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:46,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812820722] [2022-01-18 15:18:46,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812820722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:46,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16747984] [2022-01-18 15:18:46,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:46,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:46,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:46,507 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:46,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-18 15:18:46,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:18:46,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:46,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:46,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:46,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:46,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:47,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:47,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:47,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16747984] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:47,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:47,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:47,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336746286] [2022-01-18 15:18:47,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:47,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:47,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:47,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:47,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:47,080 INFO L87 Difference]: Start difference. First operand 382 states and 1171 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:47,580 INFO L93 Difference]: Finished difference Result 422 states and 1268 transitions. [2022-01-18 15:18:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:47,580 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:47,581 INFO L225 Difference]: With dead ends: 422 [2022-01-18 15:18:47,581 INFO L226 Difference]: Without dead ends: 410 [2022-01-18 15:18:47,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:47,581 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 76 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:47,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 164 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-01-18 15:18:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 379. [2022-01-18 15:18:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.068783068783069) internal successors, (1160), 378 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1160 transitions. [2022-01-18 15:18:47,585 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1160 transitions. Word has length 20 [2022-01-18 15:18:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:47,585 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1160 transitions. [2022-01-18 15:18:47,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1160 transitions. [2022-01-18 15:18:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:47,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:47,585 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:47,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-01-18 15:18:47,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-01-18 15:18:47,786 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:47,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1041797644, now seen corresponding path program 256 times [2022-01-18 15:18:47,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:47,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980622765] [2022-01-18 15:18:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:47,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:47,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:47,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980622765] [2022-01-18 15:18:47,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980622765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:47,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582536543] [2022-01-18 15:18:47,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:47,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:47,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:47,891 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:47,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-18 15:18:48,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:48,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:48,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:48,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:48,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-01-18 15:18:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:48,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:48,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:48,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:48,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582536543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:48,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:48,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:48,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152482869] [2022-01-18 15:18:48,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:48,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:48,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:48,575 INFO L87 Difference]: Start difference. First operand 379 states and 1160 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:49,041 INFO L93 Difference]: Finished difference Result 536 states and 1553 transitions. [2022-01-18 15:18:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:49,042 INFO L225 Difference]: With dead ends: 536 [2022-01-18 15:18:49,042 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 15:18:49,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:49,042 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:49,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 265 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:18:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 15:18:49,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 387. [2022-01-18 15:18:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.098445595854922) internal successors, (1196), 386 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:49,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1196 transitions. [2022-01-18 15:18:49,046 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1196 transitions. Word has length 20 [2022-01-18 15:18:49,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:49,046 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1196 transitions. [2022-01-18 15:18:49,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:49,047 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1196 transitions. [2022-01-18 15:18:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:49,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:49,047 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:49,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-01-18 15:18:49,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:49,251 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:49,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1923875078, now seen corresponding path program 257 times [2022-01-18 15:18:49,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:49,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761387251] [2022-01-18 15:18:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:49,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:49,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761387251] [2022-01-18 15:18:49,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761387251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277585810] [2022-01-18 15:18:49,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:49,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:49,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:49,350 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:49,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-18 15:18:49,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:49,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:49,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:49,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:49,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:18:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:49,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:49,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:49,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:49,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277585810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:49,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:49,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:49,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773817044] [2022-01-18 15:18:49,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:49,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:49,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:49,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:49,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:49,975 INFO L87 Difference]: Start difference. First operand 387 states and 1196 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:50,469 INFO L93 Difference]: Finished difference Result 542 states and 1554 transitions. [2022-01-18 15:18:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:18:50,469 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:50,470 INFO L225 Difference]: With dead ends: 542 [2022-01-18 15:18:50,470 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 15:18:50,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:50,470 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 145 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:50,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 289 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:18:50,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 15:18:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 390. [2022-01-18 15:18:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0796915167095116) internal successors, (1198), 389 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:50,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1198 transitions. [2022-01-18 15:18:50,475 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1198 transitions. Word has length 20 [2022-01-18 15:18:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:50,475 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1198 transitions. [2022-01-18 15:18:50,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1198 transitions. [2022-01-18 15:18:50,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:50,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:50,475 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:50,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:50,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:50,676 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:50,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:50,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1782694978, now seen corresponding path program 258 times [2022-01-18 15:18:50,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:50,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123400716] [2022-01-18 15:18:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:50,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:50,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:50,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123400716] [2022-01-18 15:18:50,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123400716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:50,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122430877] [2022-01-18 15:18:50,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:50,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:50,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:50,801 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:50,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-01-18 15:18:50,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:18:50,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:50,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:50,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:51,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:18:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:51,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:51,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:51,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:51,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122430877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:51,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:51,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:51,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764018306] [2022-01-18 15:18:51,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:51,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:51,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:51,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:51,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:51,460 INFO L87 Difference]: Start difference. First operand 390 states and 1198 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:51,916 INFO L93 Difference]: Finished difference Result 533 states and 1540 transitions. [2022-01-18 15:18:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:51,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:51,917 INFO L225 Difference]: With dead ends: 533 [2022-01-18 15:18:51,917 INFO L226 Difference]: Without dead ends: 533 [2022-01-18 15:18:51,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:51,917 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 168 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:51,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 225 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:18:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-18 15:18:51,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 383. [2022-01-18 15:18:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.089005235602094) internal successors, (1180), 382 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1180 transitions. [2022-01-18 15:18:51,921 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1180 transitions. Word has length 20 [2022-01-18 15:18:51,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:51,922 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1180 transitions. [2022-01-18 15:18:51,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1180 transitions. [2022-01-18 15:18:51,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:51,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:51,922 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:51,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-01-18 15:18:52,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-01-18 15:18:52,122 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:52,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:52,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1517896698, now seen corresponding path program 259 times [2022-01-18 15:18:52,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:52,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913457768] [2022-01-18 15:18:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:52,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:52,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:52,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913457768] [2022-01-18 15:18:52,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913457768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:52,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559060790] [2022-01-18 15:18:52,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:52,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:52,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:52,233 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:52,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-01-18 15:18:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:52,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:18:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:52,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:52,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:52,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:52,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559060790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:52,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:52,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:18:52,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172683793] [2022-01-18 15:18:52,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:52,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:52,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:52,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:52,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:52,867 INFO L87 Difference]: Start difference. First operand 383 states and 1180 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:53,203 INFO L93 Difference]: Finished difference Result 467 states and 1392 transitions. [2022-01-18 15:18:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:53,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:53,204 INFO L225 Difference]: With dead ends: 467 [2022-01-18 15:18:53,204 INFO L226 Difference]: Without dead ends: 467 [2022-01-18 15:18:53,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:53,205 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 93 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:53,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 168 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-18 15:18:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 380. [2022-01-18 15:18:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.073878627968338) internal successors, (1165), 379 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1165 transitions. [2022-01-18 15:18:53,209 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1165 transitions. Word has length 20 [2022-01-18 15:18:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:53,209 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1165 transitions. [2022-01-18 15:18:53,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1165 transitions. [2022-01-18 15:18:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:53,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:53,210 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:53,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-01-18 15:18:53,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:53,410 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:53,410 INFO L85 PathProgramCache]: Analyzing trace with hash -537443566, now seen corresponding path program 260 times [2022-01-18 15:18:53,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:53,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526278274] [2022-01-18 15:18:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:53,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:53,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:53,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526278274] [2022-01-18 15:18:53,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526278274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:53,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533530946] [2022-01-18 15:18:53,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:53,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:53,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:53,510 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:53,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-01-18 15:18:53,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:53,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:53,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:53,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:53,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-01-18 15:18:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:54,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:54,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:54,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:54,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533530946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:54,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:54,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:54,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207450951] [2022-01-18 15:18:54,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:54,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:54,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:54,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:54,184 INFO L87 Difference]: Start difference. First operand 380 states and 1165 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:54,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:54,767 INFO L93 Difference]: Finished difference Result 510 states and 1481 transitions. [2022-01-18 15:18:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:18:54,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:54,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:54,768 INFO L225 Difference]: With dead ends: 510 [2022-01-18 15:18:54,768 INFO L226 Difference]: Without dead ends: 504 [2022-01-18 15:18:54,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:18:54,768 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 135 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:54,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 280 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:18:54,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-18 15:18:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 390. [2022-01-18 15:18:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.06426735218509) internal successors, (1192), 389 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1192 transitions. [2022-01-18 15:18:54,773 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1192 transitions. Word has length 20 [2022-01-18 15:18:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:54,773 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1192 transitions. [2022-01-18 15:18:54,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1192 transitions. [2022-01-18 15:18:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:54,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:54,773 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:54,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-01-18 15:18:54,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:54,983 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:54,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:54,983 INFO L85 PathProgramCache]: Analyzing trace with hash -513543652, now seen corresponding path program 261 times [2022-01-18 15:18:54,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:54,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746187306] [2022-01-18 15:18:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:54,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:55,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:55,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746187306] [2022-01-18 15:18:55,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746187306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:55,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390963787] [2022-01-18 15:18:55,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:55,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:55,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:55,095 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:55,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-01-18 15:18:55,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:18:55,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:55,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:18:55,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:55,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 51 [2022-01-18 15:18:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:55,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:55,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:55,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-01-18 15:18:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:55,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390963787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:55,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:55,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:18:55,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285693433] [2022-01-18 15:18:55,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:55,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:55,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:55,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:55,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:55,895 INFO L87 Difference]: Start difference. First operand 390 states and 1192 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:56,597 INFO L93 Difference]: Finished difference Result 520 states and 1517 transitions. [2022-01-18 15:18:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:56,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:56,598 INFO L225 Difference]: With dead ends: 520 [2022-01-18 15:18:56,598 INFO L226 Difference]: Without dead ends: 499 [2022-01-18 15:18:56,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:18:56,598 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 144 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:56,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 236 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:18:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-18 15:18:56,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 379. [2022-01-18 15:18:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.068783068783069) internal successors, (1160), 378 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1160 transitions. [2022-01-18 15:18:56,603 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1160 transitions. Word has length 20 [2022-01-18 15:18:56,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:56,603 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1160 transitions. [2022-01-18 15:18:56,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1160 transitions. [2022-01-18 15:18:56,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:56,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:56,603 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:56,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:56,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:56,804 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:56,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash 904197766, now seen corresponding path program 262 times [2022-01-18 15:18:56,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:56,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349602808] [2022-01-18 15:18:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:56,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:56,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:56,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349602808] [2022-01-18 15:18:56,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349602808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:56,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280620800] [2022-01-18 15:18:56,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:56,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:56,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:56,901 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:56,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-01-18 15:18:57,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:57,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:57,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:57,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:57,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:18:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:57,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:57,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:57,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:57,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280620800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:57,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:57,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:57,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14076384] [2022-01-18 15:18:57,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:57,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:57,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:57,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:57,479 INFO L87 Difference]: Start difference. First operand 379 states and 1160 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:57,901 INFO L93 Difference]: Finished difference Result 413 states and 1244 transitions. [2022-01-18 15:18:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:18:57,902 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:57,902 INFO L225 Difference]: With dead ends: 413 [2022-01-18 15:18:57,902 INFO L226 Difference]: Without dead ends: 401 [2022-01-18 15:18:57,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:18:57,903 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:57,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 146 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:57,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-18 15:18:57,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 381. [2022-01-18 15:18:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.0657894736842106) internal successors, (1165), 380 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1165 transitions. [2022-01-18 15:18:57,906 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1165 transitions. Word has length 20 [2022-01-18 15:18:57,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:57,906 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1165 transitions. [2022-01-18 15:18:57,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:57,906 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1165 transitions. [2022-01-18 15:18:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:57,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:57,907 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:57,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-01-18 15:18:58,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:58,107 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:58,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:58,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1645095100, now seen corresponding path program 263 times [2022-01-18 15:18:58,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:58,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140327855] [2022-01-18 15:18:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:58,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:58,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:58,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140327855] [2022-01-18 15:18:58,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140327855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:58,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796594521] [2022-01-18 15:18:58,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:58,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:58,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:58,209 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:58,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-01-18 15:18:58,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:58,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:58,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:58,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:58,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:18:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:58,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:58,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:58,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:18:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:58,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796594521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:58,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:58,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:18:58,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950249547] [2022-01-18 15:18:58,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:58,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:18:58,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:58,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:18:58,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:18:58,779 INFO L87 Difference]: Start difference. First operand 381 states and 1165 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:59,295 INFO L93 Difference]: Finished difference Result 438 states and 1296 transitions. [2022-01-18 15:18:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:59,295 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:18:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:59,296 INFO L225 Difference]: With dead ends: 438 [2022-01-18 15:18:59,296 INFO L226 Difference]: Without dead ends: 432 [2022-01-18 15:18:59,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:59,296 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 130 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:59,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 191 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:18:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-18 15:18:59,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 391. [2022-01-18 15:18:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.056410256410256) internal successors, (1192), 390 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1192 transitions. [2022-01-18 15:18:59,300 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1192 transitions. Word has length 20 [2022-01-18 15:18:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:59,300 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1192 transitions. [2022-01-18 15:18:59,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1192 transitions. [2022-01-18 15:18:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:18:59,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:59,301 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:59,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-01-18 15:18:59,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:59,501 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:59,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:59,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1668995014, now seen corresponding path program 264 times [2022-01-18 15:18:59,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:59,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501591515] [2022-01-18 15:18:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:59,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:59,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:59,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501591515] [2022-01-18 15:18:59,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501591515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:59,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749765566] [2022-01-18 15:18:59,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:59,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:59,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:59,610 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:59,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-01-18 15:18:59,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:18:59,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:59,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:59,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:59,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:19:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:00,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:00,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:00,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:00,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749765566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:00,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:00,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:00,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582822185] [2022-01-18 15:19:00,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:00,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:00,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:00,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:00,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:00,207 INFO L87 Difference]: Start difference. First operand 391 states and 1192 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:00,565 INFO L93 Difference]: Finished difference Result 409 states and 1242 transitions. [2022-01-18 15:19:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:00,565 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:00,566 INFO L225 Difference]: With dead ends: 409 [2022-01-18 15:19:00,566 INFO L226 Difference]: Without dead ends: 409 [2022-01-18 15:19:00,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:19:00,566 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:00,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 135 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-18 15:19:00,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 376. [2022-01-18 15:19:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.058666666666667) internal successors, (1147), 375 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1147 transitions. [2022-01-18 15:19:00,570 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1147 transitions. Word has length 20 [2022-01-18 15:19:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:00,570 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1147 transitions. [2022-01-18 15:19:00,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1147 transitions. [2022-01-18 15:19:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:00,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:00,571 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:00,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-01-18 15:19:00,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-01-18 15:19:00,771 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:00,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:00,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1682460558, now seen corresponding path program 265 times [2022-01-18 15:19:00,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:00,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515397721] [2022-01-18 15:19:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:00,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:00,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:00,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515397721] [2022-01-18 15:19:00,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515397721] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:00,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284094414] [2022-01-18 15:19:00,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:00,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:00,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:00,843 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:00,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-01-18 15:19:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:00,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:00,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:01,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:01,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:01,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:01,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:01,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284094414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:01,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:01,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:19:01,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583037096] [2022-01-18 15:19:01,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:01,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:19:01,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:01,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:19:01,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:19:01,297 INFO L87 Difference]: Start difference. First operand 376 states and 1147 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:01,529 INFO L93 Difference]: Finished difference Result 605 states and 1760 transitions. [2022-01-18 15:19:01,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:01,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:01,530 INFO L225 Difference]: With dead ends: 605 [2022-01-18 15:19:01,530 INFO L226 Difference]: Without dead ends: 605 [2022-01-18 15:19:01,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:01,530 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 129 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:01,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 185 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-18 15:19:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 394. [2022-01-18 15:19:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.1017811704834606) internal successors, (1219), 393 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1219 transitions. [2022-01-18 15:19:01,535 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1219 transitions. Word has length 20 [2022-01-18 15:19:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:01,535 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1219 transitions. [2022-01-18 15:19:01,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1219 transitions. [2022-01-18 15:19:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:01,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:01,535 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:01,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-01-18 15:19:01,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-01-18 15:19:01,736 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2074651160, now seen corresponding path program 266 times [2022-01-18 15:19:01,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:01,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164540124] [2022-01-18 15:19:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:01,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:01,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:01,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164540124] [2022-01-18 15:19:01,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164540124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:01,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183400875] [2022-01-18 15:19:01,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:01,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:01,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:01,812 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:01,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-01-18 15:19:01,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:01,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:01,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:01,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:02,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:02,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:02,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:02,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:02,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183400875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:02,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:02,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:02,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950784165] [2022-01-18 15:19:02,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:02,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:02,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:02,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:02,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:02,289 INFO L87 Difference]: Start difference. First operand 394 states and 1219 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:02,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:02,574 INFO L93 Difference]: Finished difference Result 616 states and 1787 transitions. [2022-01-18 15:19:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:02,574 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:02,575 INFO L225 Difference]: With dead ends: 616 [2022-01-18 15:19:02,575 INFO L226 Difference]: Without dead ends: 616 [2022-01-18 15:19:02,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:19:02,576 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 203 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:02,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 201 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-18 15:19:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 400. [2022-01-18 15:19:02,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.117794486215539) internal successors, (1244), 399 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1244 transitions. [2022-01-18 15:19:02,580 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1244 transitions. Word has length 20 [2022-01-18 15:19:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:02,580 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1244 transitions. [2022-01-18 15:19:02,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1244 transitions. [2022-01-18 15:19:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:02,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:02,581 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:02,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-01-18 15:19:02,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-01-18 15:19:02,789 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:02,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1192573726, now seen corresponding path program 267 times [2022-01-18 15:19:02,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:02,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667338869] [2022-01-18 15:19:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:02,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:02,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:02,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667338869] [2022-01-18 15:19:02,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667338869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:02,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871579351] [2022-01-18 15:19:02,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:02,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:02,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:02,863 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:02,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-01-18 15:19:03,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:19:03,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:03,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:03,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:03,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:03,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:03,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:03,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:03,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871579351] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:03,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:03,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:19:03,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334826980] [2022-01-18 15:19:03,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:03,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:19:03,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:03,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:19:03,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:19:03,305 INFO L87 Difference]: Start difference. First operand 400 states and 1244 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:03,544 INFO L93 Difference]: Finished difference Result 573 states and 1678 transitions. [2022-01-18 15:19:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:03,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:03,545 INFO L225 Difference]: With dead ends: 573 [2022-01-18 15:19:03,545 INFO L226 Difference]: Without dead ends: 567 [2022-01-18 15:19:03,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:03,545 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:03,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 214 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-18 15:19:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 398. [2022-01-18 15:19:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.1057934508816123) internal successors, (1233), 397 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1233 transitions. [2022-01-18 15:19:03,550 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1233 transitions. Word has length 20 [2022-01-18 15:19:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:03,550 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1233 transitions. [2022-01-18 15:19:03,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1233 transitions. [2022-01-18 15:19:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:03,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:03,550 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:03,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-01-18 15:19:03,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-01-18 15:19:03,751 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:03,751 INFO L85 PathProgramCache]: Analyzing trace with hash -239316843, now seen corresponding path program 268 times [2022-01-18 15:19:03,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:03,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212982239] [2022-01-18 15:19:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:03,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:03,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:03,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212982239] [2022-01-18 15:19:03,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212982239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:03,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233863367] [2022-01-18 15:19:03,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:03,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:03,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:03,812 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:03,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-01-18 15:19:03,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:03,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:03,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:03,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:04,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:19:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:04,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:04,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:04,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:04,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233863367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:04,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:04,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:19:04,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300952139] [2022-01-18 15:19:04,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:04,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:19:04,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:04,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:19:04,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:19:04,382 INFO L87 Difference]: Start difference. First operand 398 states and 1233 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:04,914 INFO L93 Difference]: Finished difference Result 758 states and 2125 transitions. [2022-01-18 15:19:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:19:04,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:04,915 INFO L225 Difference]: With dead ends: 758 [2022-01-18 15:19:04,915 INFO L226 Difference]: Without dead ends: 603 [2022-01-18 15:19:04,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:19:04,916 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 182 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:04,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 247 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:19:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-18 15:19:04,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 394. [2022-01-18 15:19:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0865139949109417) internal successors, (1213), 393 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1213 transitions. [2022-01-18 15:19:04,920 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1213 transitions. Word has length 20 [2022-01-18 15:19:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:04,920 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1213 transitions. [2022-01-18 15:19:04,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1213 transitions. [2022-01-18 15:19:04,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:04,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:04,921 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:04,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-01-18 15:19:05,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-01-18 15:19:05,121 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:05,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:05,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1119525864, now seen corresponding path program 269 times [2022-01-18 15:19:05,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:05,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892884162] [2022-01-18 15:19:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:05,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:05,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:05,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892884162] [2022-01-18 15:19:05,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892884162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:05,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320328821] [2022-01-18 15:19:05,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:05,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:05,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:05,202 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:05,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-01-18 15:19:05,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:05,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:05,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:05,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:05,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:05,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:05,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:05,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:05,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320328821] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:05,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:05,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:05,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729301458] [2022-01-18 15:19:05,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:05,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:05,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:05,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:05,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:05,682 INFO L87 Difference]: Start difference. First operand 394 states and 1213 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:05,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:05,960 INFO L93 Difference]: Finished difference Result 690 states and 1994 transitions. [2022-01-18 15:19:05,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:05,960 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:05,961 INFO L225 Difference]: With dead ends: 690 [2022-01-18 15:19:05,961 INFO L226 Difference]: Without dead ends: 690 [2022-01-18 15:19:05,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:05,961 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 142 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:05,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 234 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:05,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-18 15:19:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 389. [2022-01-18 15:19:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.079896907216495) internal successors, (1195), 388 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1195 transitions. [2022-01-18 15:19:05,966 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1195 transitions. Word has length 20 [2022-01-18 15:19:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:05,966 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1195 transitions. [2022-01-18 15:19:05,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1195 transitions. [2022-01-18 15:19:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:05,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:05,967 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:05,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-01-18 15:19:06,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-01-18 15:19:06,167 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1395393816, now seen corresponding path program 270 times [2022-01-18 15:19:06,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:06,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409431300] [2022-01-18 15:19:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:06,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:06,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:06,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409431300] [2022-01-18 15:19:06,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409431300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:06,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65940481] [2022-01-18 15:19:06,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:06,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:06,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:06,254 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:06,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-01-18 15:19:06,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:19:06,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:06,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:06,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:06,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:06,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:06,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:06,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:06,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65940481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:06,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:06,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:06,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339646080] [2022-01-18 15:19:06,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:06,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:06,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:06,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:06,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:06,782 INFO L87 Difference]: Start difference. First operand 389 states and 1195 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:07,079 INFO L93 Difference]: Finished difference Result 650 states and 1884 transitions. [2022-01-18 15:19:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:07,079 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:07,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:07,080 INFO L225 Difference]: With dead ends: 650 [2022-01-18 15:19:07,080 INFO L226 Difference]: Without dead ends: 650 [2022-01-18 15:19:07,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:07,080 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:07,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 277 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:19:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-18 15:19:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 396. [2022-01-18 15:19:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.09873417721519) internal successors, (1224), 395 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1224 transitions. [2022-01-18 15:19:07,085 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1224 transitions. Word has length 20 [2022-01-18 15:19:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:07,086 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1224 transitions. [2022-01-18 15:19:07,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:07,086 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1224 transitions. [2022-01-18 15:19:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:07,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:07,086 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:07,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-01-18 15:19:07,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:07,286 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash -121238962, now seen corresponding path program 271 times [2022-01-18 15:19:07,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:07,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981692919] [2022-01-18 15:19:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:07,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:07,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:07,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981692919] [2022-01-18 15:19:07,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981692919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:07,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438453749] [2022-01-18 15:19:07,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:07,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:07,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:07,377 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:07,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-01-18 15:19:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:07,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:07,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:07,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:07,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:07,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:07,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:07,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438453749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:07,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:07,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:07,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173869629] [2022-01-18 15:19:07,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:07,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:07,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:07,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:07,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:07,873 INFO L87 Difference]: Start difference. First operand 396 states and 1224 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:08,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:08,125 INFO L93 Difference]: Finished difference Result 617 states and 1807 transitions. [2022-01-18 15:19:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:08,125 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:08,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:08,126 INFO L225 Difference]: With dead ends: 617 [2022-01-18 15:19:08,126 INFO L226 Difference]: Without dead ends: 617 [2022-01-18 15:19:08,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:08,126 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:08,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 237 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:08,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-01-18 15:19:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 387. [2022-01-18 15:19:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.069948186528497) internal successors, (1185), 386 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1185 transitions. [2022-01-18 15:19:08,131 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1185 transitions. Word has length 20 [2022-01-18 15:19:08,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:08,131 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1185 transitions. [2022-01-18 15:19:08,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1185 transitions. [2022-01-18 15:19:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:08,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:08,131 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:08,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:08,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:08,332 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2089839597, now seen corresponding path program 272 times [2022-01-18 15:19:08,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:08,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629084254] [2022-01-18 15:19:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:08,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:08,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:08,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629084254] [2022-01-18 15:19:08,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629084254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:08,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899088560] [2022-01-18 15:19:08,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:08,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:08,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:08,385 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:08,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-01-18 15:19:08,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:08,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:08,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:08,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:08,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:19:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:08,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:08,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:08,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:08,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899088560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:08,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:08,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 15:19:08,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311706966] [2022-01-18 15:19:08,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:08,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:19:08,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:08,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:19:08,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:19:08,883 INFO L87 Difference]: Start difference. First operand 387 states and 1185 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:09,278 INFO L93 Difference]: Finished difference Result 598 states and 1712 transitions. [2022-01-18 15:19:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:09,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:09,279 INFO L225 Difference]: With dead ends: 598 [2022-01-18 15:19:09,279 INFO L226 Difference]: Without dead ends: 514 [2022-01-18 15:19:09,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:19:09,279 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:09,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 218 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-18 15:19:09,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 384. [2022-01-18 15:19:09,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.049608355091384) internal successors, (1168), 383 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1168 transitions. [2022-01-18 15:19:09,283 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1168 transitions. Word has length 20 [2022-01-18 15:19:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:09,283 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1168 transitions. [2022-01-18 15:19:09,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:09,284 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1168 transitions. [2022-01-18 15:19:09,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:09,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:09,284 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:09,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-01-18 15:19:09,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:09,484 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:09,485 INFO L85 PathProgramCache]: Analyzing trace with hash -872338792, now seen corresponding path program 273 times [2022-01-18 15:19:09,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:09,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292054450] [2022-01-18 15:19:09,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:09,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:09,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:09,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292054450] [2022-01-18 15:19:09,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292054450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:09,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990639802] [2022-01-18 15:19:09,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:09,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:09,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:09,573 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:09,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-01-18 15:19:09,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:19:09,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:09,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:09,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:09,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:09,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:10,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:10,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:10,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990639802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:10,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:10,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:10,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445361481] [2022-01-18 15:19:10,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:10,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:10,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:10,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:10,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:10,099 INFO L87 Difference]: Start difference. First operand 384 states and 1168 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:10,474 INFO L93 Difference]: Finished difference Result 728 states and 2045 transitions. [2022-01-18 15:19:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:10,474 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:10,475 INFO L225 Difference]: With dead ends: 728 [2022-01-18 15:19:10,475 INFO L226 Difference]: Without dead ends: 728 [2022-01-18 15:19:10,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:19:10,475 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 168 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:10,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 256 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:19:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-01-18 15:19:10,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 392. [2022-01-18 15:19:10,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.079283887468031) internal successors, (1204), 391 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1204 transitions. [2022-01-18 15:19:10,481 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1204 transitions. Word has length 20 [2022-01-18 15:19:10,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:10,481 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1204 transitions. [2022-01-18 15:19:10,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1204 transitions. [2022-01-18 15:19:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:10,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:10,481 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:10,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:10,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:10,682 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:10,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:10,682 INFO L85 PathProgramCache]: Analyzing trace with hash 9738642, now seen corresponding path program 274 times [2022-01-18 15:19:10,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:10,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358953092] [2022-01-18 15:19:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:10,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:10,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:10,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358953092] [2022-01-18 15:19:10,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358953092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:10,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121260701] [2022-01-18 15:19:10,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:10,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:10,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:10,766 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:10,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-01-18 15:19:10,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:10,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:10,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:10,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:10,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:11,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:11,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:11,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:11,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121260701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:11,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:11,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:11,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016875042] [2022-01-18 15:19:11,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:11,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:11,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:11,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:11,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:11,269 INFO L87 Difference]: Start difference. First operand 392 states and 1204 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:11,505 INFO L93 Difference]: Finished difference Result 662 states and 1891 transitions. [2022-01-18 15:19:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:11,505 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:11,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:11,506 INFO L225 Difference]: With dead ends: 662 [2022-01-18 15:19:11,506 INFO L226 Difference]: Without dead ends: 656 [2022-01-18 15:19:11,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:11,506 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 186 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:11,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 195 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-01-18 15:19:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 386. [2022-01-18 15:19:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.0623376623376624) internal successors, (1179), 385 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1179 transitions. [2022-01-18 15:19:11,511 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1179 transitions. Word has length 20 [2022-01-18 15:19:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:11,512 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1179 transitions. [2022-01-18 15:19:11,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:11,512 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1179 transitions. [2022-01-18 15:19:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:11,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:11,518 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:11,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:11,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:11,726 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:11,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:11,727 INFO L85 PathProgramCache]: Analyzing trace with hash -131441458, now seen corresponding path program 275 times [2022-01-18 15:19:11,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:11,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980891808] [2022-01-18 15:19:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:11,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:11,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:11,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980891808] [2022-01-18 15:19:11,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980891808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:11,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247112757] [2022-01-18 15:19:11,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:11,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:11,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:11,823 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:11,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-01-18 15:19:11,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:11,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:12,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:12,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:12,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:12,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:12,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247112757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:12,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:12,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:12,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947807951] [2022-01-18 15:19:12,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:12,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:12,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:12,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:12,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:12,339 INFO L87 Difference]: Start difference. First operand 386 states and 1179 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:12,607 INFO L93 Difference]: Finished difference Result 687 states and 1980 transitions. [2022-01-18 15:19:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:12,607 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:12,608 INFO L225 Difference]: With dead ends: 687 [2022-01-18 15:19:12,608 INFO L226 Difference]: Without dead ends: 687 [2022-01-18 15:19:12,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:19:12,608 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 168 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:12,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 232 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:12,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-01-18 15:19:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 389. [2022-01-18 15:19:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.077319587628866) internal successors, (1194), 388 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1194 transitions. [2022-01-18 15:19:12,613 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1194 transitions. Word has length 20 [2022-01-18 15:19:12,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:12,613 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1194 transitions. [2022-01-18 15:19:12,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1194 transitions. [2022-01-18 15:19:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:12,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:12,614 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:12,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-01-18 15:19:12,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-01-18 15:19:12,814 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:12,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:12,815 INFO L85 PathProgramCache]: Analyzing trace with hash 862934162, now seen corresponding path program 276 times [2022-01-18 15:19:12,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:12,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599861140] [2022-01-18 15:19:12,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:12,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:12,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:12,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599861140] [2022-01-18 15:19:12,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599861140] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:12,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977000917] [2022-01-18 15:19:12,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:12,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:12,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:12,909 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:12,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-01-18 15:19:13,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:19:13,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:13,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:13,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:13,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:13,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:13,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:13,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:13,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977000917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:13,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:13,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:13,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897367820] [2022-01-18 15:19:13,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:13,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:13,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:13,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:13,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:13,440 INFO L87 Difference]: Start difference. First operand 389 states and 1194 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:13,691 INFO L93 Difference]: Finished difference Result 656 states and 1913 transitions. [2022-01-18 15:19:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:13,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:13,693 INFO L225 Difference]: With dead ends: 656 [2022-01-18 15:19:13,693 INFO L226 Difference]: Without dead ends: 656 [2022-01-18 15:19:13,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:19:13,693 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 136 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:13,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 207 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:13,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-01-18 15:19:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 386. [2022-01-18 15:19:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.0623376623376624) internal successors, (1179), 385 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1179 transitions. [2022-01-18 15:19:13,698 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1179 transitions. Word has length 20 [2022-01-18 15:19:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:13,698 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1179 transitions. [2022-01-18 15:19:13,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1179 transitions. [2022-01-18 15:19:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:13,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:13,699 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:13,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-01-18 15:19:13,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-01-18 15:19:13,899 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:13,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:13,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1843387294, now seen corresponding path program 277 times [2022-01-18 15:19:13,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:13,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592602086] [2022-01-18 15:19:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:13,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:14,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:14,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592602086] [2022-01-18 15:19:14,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592602086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:14,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506793668] [2022-01-18 15:19:14,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:14,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:14,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:14,009 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:14,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-01-18 15:19:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:14,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:14,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:14,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:14,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:14,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:14,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:14,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506793668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:14,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:14,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:14,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637707113] [2022-01-18 15:19:14,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:14,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:14,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:14,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:14,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:14,489 INFO L87 Difference]: Start difference. First operand 386 states and 1179 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:14,701 INFO L93 Difference]: Finished difference Result 610 states and 1760 transitions. [2022-01-18 15:19:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:14,702 INFO L225 Difference]: With dead ends: 610 [2022-01-18 15:19:14,702 INFO L226 Difference]: Without dead ends: 604 [2022-01-18 15:19:14,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:14,703 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 141 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:14,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 165 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:14,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-18 15:19:14,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 390. [2022-01-18 15:19:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0668380462724936) internal successors, (1193), 389 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1193 transitions. [2022-01-18 15:19:14,714 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1193 transitions. Word has length 20 [2022-01-18 15:19:14,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:14,714 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1193 transitions. [2022-01-18 15:19:14,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1193 transitions. [2022-01-18 15:19:14,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:14,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:14,715 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:14,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-01-18 15:19:14,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-01-18 15:19:14,915 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:14,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:14,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1867287208, now seen corresponding path program 278 times [2022-01-18 15:19:14,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:14,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103729576] [2022-01-18 15:19:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:14,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:15,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103729576] [2022-01-18 15:19:15,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103729576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869422572] [2022-01-18 15:19:15,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:15,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:15,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:15,011 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:15,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-01-18 15:19:15,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:15,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:15,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:15,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:15,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:15,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:15,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:15,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:15,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869422572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:15,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:15,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:15,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595672316] [2022-01-18 15:19:15,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:15,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:15,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:15,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:15,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:15,506 INFO L87 Difference]: Start difference. First operand 390 states and 1193 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:15,771 INFO L93 Difference]: Finished difference Result 616 states and 1781 transitions. [2022-01-18 15:19:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:19:15,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:15,772 INFO L225 Difference]: With dead ends: 616 [2022-01-18 15:19:15,772 INFO L226 Difference]: Without dead ends: 616 [2022-01-18 15:19:15,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:19:15,772 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 130 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:15,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 223 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-18 15:19:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 385. [2022-01-18 15:19:15,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0598958333333335) internal successors, (1175), 384 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1175 transitions. [2022-01-18 15:19:15,777 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1175 transitions. Word has length 20 [2022-01-18 15:19:15,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:15,777 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1175 transitions. [2022-01-18 15:19:15,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1175 transitions. [2022-01-18 15:19:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:15,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:15,777 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:15,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-01-18 15:19:15,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-01-18 15:19:15,978 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:15,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1051948166, now seen corresponding path program 279 times [2022-01-18 15:19:15,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:15,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847820076] [2022-01-18 15:19:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:15,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:16,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:16,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847820076] [2022-01-18 15:19:16,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847820076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:16,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989419795] [2022-01-18 15:19:16,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:16,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:16,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:16,061 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:16,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-01-18 15:19:16,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:19:16,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:16,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:19:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:16,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:16,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:16,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:16,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989419795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:16,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:16,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:16,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624847979] [2022-01-18 15:19:16,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:16,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:16,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:16,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:16,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:16,490 INFO L87 Difference]: Start difference. First operand 385 states and 1175 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:16,745 INFO L93 Difference]: Finished difference Result 534 states and 1588 transitions. [2022-01-18 15:19:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:16,745 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:16,746 INFO L225 Difference]: With dead ends: 534 [2022-01-18 15:19:16,746 INFO L226 Difference]: Without dead ends: 534 [2022-01-18 15:19:16,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:16,746 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 110 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:16,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 226 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-18 15:19:16,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 378. [2022-01-18 15:19:16,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.047745358090186) internal successors, (1149), 377 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1149 transitions. [2022-01-18 15:19:16,751 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1149 transitions. Word has length 20 [2022-01-18 15:19:16,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:16,751 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1149 transitions. [2022-01-18 15:19:16,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:16,751 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1149 transitions. [2022-01-18 15:19:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:16,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:16,751 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:16,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-01-18 15:19:16,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-01-18 15:19:16,952 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:16,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:16,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2031860670, now seen corresponding path program 280 times [2022-01-18 15:19:16,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:16,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033427755] [2022-01-18 15:19:16,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:16,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:17,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:17,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033427755] [2022-01-18 15:19:17,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033427755] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:17,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135509424] [2022-01-18 15:19:17,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:17,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:17,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:17,029 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:17,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-01-18 15:19:17,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:17,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:17,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:17,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:17,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:19:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:17,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:17,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:17,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:17,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135509424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:17,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:17,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:17,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118940459] [2022-01-18 15:19:17,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:17,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:17,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:17,512 INFO L87 Difference]: Start difference. First operand 378 states and 1149 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:17,747 INFO L93 Difference]: Finished difference Result 528 states and 1548 transitions. [2022-01-18 15:19:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:17,748 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:17,748 INFO L225 Difference]: With dead ends: 528 [2022-01-18 15:19:17,748 INFO L226 Difference]: Without dead ends: 528 [2022-01-18 15:19:17,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:17,749 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 142 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:17,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 202 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-18 15:19:17,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 385. [2022-01-18 15:19:17,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0416666666666665) internal successors, (1168), 384 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1168 transitions. [2022-01-18 15:19:17,753 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1168 transitions. Word has length 20 [2022-01-18 15:19:17,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:17,753 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1168 transitions. [2022-01-18 15:19:17,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:17,753 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1168 transitions. [2022-01-18 15:19:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:17,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:17,754 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:17,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-01-18 15:19:17,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:17,954 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:17,954 INFO L85 PathProgramCache]: Analyzing trace with hash -757705816, now seen corresponding path program 281 times [2022-01-18 15:19:17,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:17,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358757939] [2022-01-18 15:19:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:17,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:18,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:18,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358757939] [2022-01-18 15:19:18,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358757939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:18,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393626630] [2022-01-18 15:19:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:18,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:18,045 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:18,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-01-18 15:19:18,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:18,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:18,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:18,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:18,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:18,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-01-18 15:19:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:18,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:18,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:18,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:18,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393626630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:18,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:18,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:18,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020976506] [2022-01-18 15:19:18,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:18,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:18,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:18,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:18,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:18,576 INFO L87 Difference]: Start difference. First operand 385 states and 1168 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:18,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:18,763 INFO L93 Difference]: Finished difference Result 505 states and 1523 transitions. [2022-01-18 15:19:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:18,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:18,764 INFO L225 Difference]: With dead ends: 505 [2022-01-18 15:19:18,764 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 15:19:18,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:18,764 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:18,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 197 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 529 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-01-18 15:19:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 15:19:18,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 385. [2022-01-18 15:19:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0390625) internal successors, (1167), 384 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1167 transitions. [2022-01-18 15:19:18,768 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1167 transitions. Word has length 20 [2022-01-18 15:19:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:18,768 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1167 transitions. [2022-01-18 15:19:18,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:18,769 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1167 transitions. [2022-01-18 15:19:18,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:18,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:18,769 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:18,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-01-18 15:19:18,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-01-18 15:19:18,969 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:18,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1847318576, now seen corresponding path program 282 times [2022-01-18 15:19:18,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:18,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190347198] [2022-01-18 15:19:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:18,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:19,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:19,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190347198] [2022-01-18 15:19:19,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190347198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:19,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2611517] [2022-01-18 15:19:19,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:19,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:19,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:19,051 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:19,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-01-18 15:19:19,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:19:19,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:19,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:19,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:19,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:19:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:19,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:19,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:19,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:19,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2611517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:19,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:19,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:19,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146343344] [2022-01-18 15:19:19,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:19,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:19,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:19,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:19,523 INFO L87 Difference]: Start difference. First operand 385 states and 1167 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:19,773 INFO L93 Difference]: Finished difference Result 485 states and 1450 transitions. [2022-01-18 15:19:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:19,774 INFO L225 Difference]: With dead ends: 485 [2022-01-18 15:19:19,774 INFO L226 Difference]: Without dead ends: 485 [2022-01-18 15:19:19,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:19,774 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 104 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:19,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 215 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-18 15:19:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 368. [2022-01-18 15:19:19,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.016348773841962) internal successors, (1107), 367 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1107 transitions. [2022-01-18 15:19:19,778 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1107 transitions. Word has length 20 [2022-01-18 15:19:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:19,778 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1107 transitions. [2022-01-18 15:19:19,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1107 transitions. [2022-01-18 15:19:19,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:19,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:19,779 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:19,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-01-18 15:19:19,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:19,979 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash 600706988, now seen corresponding path program 283 times [2022-01-18 15:19:19,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:19,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267708217] [2022-01-18 15:19:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:19,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:20,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:20,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267708217] [2022-01-18 15:19:20,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267708217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:20,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125841382] [2022-01-18 15:19:20,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:20,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:20,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:20,054 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:20,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-01-18 15:19:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:20,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:20,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:20,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:19:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:20,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:20,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:20,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:20,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125841382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:20,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:20,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:20,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926181346] [2022-01-18 15:19:20,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:20,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:20,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:20,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:20,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:20,553 INFO L87 Difference]: Start difference. First operand 368 states and 1107 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:20,814 INFO L93 Difference]: Finished difference Result 438 states and 1293 transitions. [2022-01-18 15:19:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:20,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:20,815 INFO L225 Difference]: With dead ends: 438 [2022-01-18 15:19:20,815 INFO L226 Difference]: Without dead ends: 438 [2022-01-18 15:19:20,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:20,815 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 120 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:20,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 228 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-18 15:19:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 374. [2022-01-18 15:19:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.040214477211796) internal successors, (1134), 373 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1134 transitions. [2022-01-18 15:19:20,819 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1134 transitions. Word has length 20 [2022-01-18 15:19:20,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:20,819 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1134 transitions. [2022-01-18 15:19:20,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1134 transitions. [2022-01-18 15:19:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:20,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:20,820 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:20,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:21,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:21,020 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1874861842, now seen corresponding path program 284 times [2022-01-18 15:19:21,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:21,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460540470] [2022-01-18 15:19:21,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:21,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:21,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:21,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460540470] [2022-01-18 15:19:21,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460540470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:21,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929132947] [2022-01-18 15:19:21,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:21,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:21,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:21,098 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:21,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-01-18 15:19:21,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:21,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:21,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:21,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:21,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:19:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:21,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:21,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:21,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:21,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929132947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:21,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:21,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:21,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434514365] [2022-01-18 15:19:21,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:21,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:21,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:21,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:21,604 INFO L87 Difference]: Start difference. First operand 374 states and 1134 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:21,902 INFO L93 Difference]: Finished difference Result 444 states and 1308 transitions. [2022-01-18 15:19:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:19:21,902 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:21,903 INFO L225 Difference]: With dead ends: 444 [2022-01-18 15:19:21,903 INFO L226 Difference]: Without dead ends: 444 [2022-01-18 15:19:21,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:19:21,904 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 101 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:21,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 249 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-18 15:19:21,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 371. [2022-01-18 15:19:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.0243243243243243) internal successors, (1119), 370 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:21,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1119 transitions. [2022-01-18 15:19:21,908 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1119 transitions. Word has length 20 [2022-01-18 15:19:21,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:21,908 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1119 transitions. [2022-01-18 15:19:21,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1119 transitions. [2022-01-18 15:19:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:21,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:21,908 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:21,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:22,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:22,109 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1877487618, now seen corresponding path program 285 times [2022-01-18 15:19:22,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:22,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034200082] [2022-01-18 15:19:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:22,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:22,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:22,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034200082] [2022-01-18 15:19:22,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034200082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:22,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552115041] [2022-01-18 15:19:22,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:22,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:22,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:22,179 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:22,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-01-18 15:19:22,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:19:22,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:22,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:22,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:22,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:22,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:22,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552115041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:22,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:22,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:22,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86179262] [2022-01-18 15:19:22,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:22,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:22,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:22,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:22,644 INFO L87 Difference]: Start difference. First operand 371 states and 1119 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:22,838 INFO L93 Difference]: Finished difference Result 402 states and 1201 transitions. [2022-01-18 15:19:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:22,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:22,839 INFO L225 Difference]: With dead ends: 402 [2022-01-18 15:19:22,839 INFO L226 Difference]: Without dead ends: 402 [2022-01-18 15:19:22,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:22,839 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:22,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 152 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-18 15:19:22,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 362. [2022-01-18 15:19:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0166204986149583) internal successors, (1089), 361 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1089 transitions. [2022-01-18 15:19:22,843 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1089 transitions. Word has length 20 [2022-01-18 15:19:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:22,843 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1089 transitions. [2022-01-18 15:19:22,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1089 transitions. [2022-01-18 15:19:22,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:22,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:22,844 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:22,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-01-18 15:19:23,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:23,044 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:23,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1241217125, now seen corresponding path program 286 times [2022-01-18 15:19:23,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:23,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342402173] [2022-01-18 15:19:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:23,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:23,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:23,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342402173] [2022-01-18 15:19:23,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342402173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:23,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490748560] [2022-01-18 15:19:23,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:23,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:23,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:23,115 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:23,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-01-18 15:19:23,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:23,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:23,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:23,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:23,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:23,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:23,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:23,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:23,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490748560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:23,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:23,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 15:19:23,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813147551] [2022-01-18 15:19:23,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:23,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:19:23,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:23,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:19:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:19:23,581 INFO L87 Difference]: Start difference. First operand 362 states and 1089 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:23,828 INFO L93 Difference]: Finished difference Result 460 states and 1331 transitions. [2022-01-18 15:19:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:23,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:23,829 INFO L225 Difference]: With dead ends: 460 [2022-01-18 15:19:23,829 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 15:19:23,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:23,829 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 99 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:23,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 157 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:23,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 15:19:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 356. [2022-01-18 15:19:23,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.0028169014084507) internal successors, (1066), 355 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1066 transitions. [2022-01-18 15:19:23,833 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1066 transitions. Word has length 20 [2022-01-18 15:19:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:23,833 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1066 transitions. [2022-01-18 15:19:23,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1066 transitions. [2022-01-18 15:19:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:23,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:23,834 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:23,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:24,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-01-18 15:19:24,034 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:24,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:24,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2145272500, now seen corresponding path program 287 times [2022-01-18 15:19:24,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:24,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581971779] [2022-01-18 15:19:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:24,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:24,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:24,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581971779] [2022-01-18 15:19:24,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581971779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:24,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687673776] [2022-01-18 15:19:24,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:24,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:24,118 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:24,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-01-18 15:19:24,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:24,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:24,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:24,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:24,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:19:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:24,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:24,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:24,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:24,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687673776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:24,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:24,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:24,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13050039] [2022-01-18 15:19:24,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:24,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:24,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:24,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:24,660 INFO L87 Difference]: Start difference. First operand 356 states and 1066 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:24,987 INFO L93 Difference]: Finished difference Result 566 states and 1601 transitions. [2022-01-18 15:19:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:24,987 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:24,988 INFO L225 Difference]: With dead ends: 566 [2022-01-18 15:19:24,988 INFO L226 Difference]: Without dead ends: 566 [2022-01-18 15:19:24,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:19:24,988 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:24,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 255 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-18 15:19:24,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 366. [2022-01-18 15:19:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.043835616438356) internal successors, (1111), 365 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1111 transitions. [2022-01-18 15:19:24,992 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1111 transitions. Word has length 20 [2022-01-18 15:19:24,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:24,992 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1111 transitions. [2022-01-18 15:19:24,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1111 transitions. [2022-01-18 15:19:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:24,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:24,993 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:25,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-01-18 15:19:25,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-01-18 15:19:25,193 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:25,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1263195066, now seen corresponding path program 288 times [2022-01-18 15:19:25,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:25,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204527564] [2022-01-18 15:19:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:25,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:25,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:25,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204527564] [2022-01-18 15:19:25,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204527564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:25,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928970970] [2022-01-18 15:19:25,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:25,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:25,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:25,276 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:25,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-01-18 15:19:25,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:19:25,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:25,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:25,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:25,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:19:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:25,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:25,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:25,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:25,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928970970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:25,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:25,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:25,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611211370] [2022-01-18 15:19:25,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:25,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:25,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:25,814 INFO L87 Difference]: Start difference. First operand 366 states and 1111 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:26,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:26,041 INFO L93 Difference]: Finished difference Result 500 states and 1447 transitions. [2022-01-18 15:19:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:26,041 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:26,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:26,042 INFO L225 Difference]: With dead ends: 500 [2022-01-18 15:19:26,042 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 15:19:26,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:26,042 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 153 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:26,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 174 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:26,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 15:19:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 369. [2022-01-18 15:19:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.0244565217391304) internal successors, (1113), 368 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1113 transitions. [2022-01-18 15:19:26,046 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1113 transitions. Word has length 20 [2022-01-18 15:19:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:26,046 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1113 transitions. [2022-01-18 15:19:26,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1113 transitions. [2022-01-18 15:19:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:26,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:26,047 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:26,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-01-18 15:19:26,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:26,247 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:26,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1404375166, now seen corresponding path program 289 times [2022-01-18 15:19:26,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:26,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417390876] [2022-01-18 15:19:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:26,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:26,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:26,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417390876] [2022-01-18 15:19:26,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417390876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:26,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73345368] [2022-01-18 15:19:26,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:26,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:26,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:26,346 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:26,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-01-18 15:19:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:26,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:26,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:26,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:19:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:26,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:26,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:26,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:26,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73345368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:26,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:26,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:26,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446345377] [2022-01-18 15:19:26,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:26,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:26,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:26,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:26,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:26,893 INFO L87 Difference]: Start difference. First operand 369 states and 1113 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:27,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:27,217 INFO L93 Difference]: Finished difference Result 571 states and 1645 transitions. [2022-01-18 15:19:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:27,218 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:27,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:27,218 INFO L225 Difference]: With dead ends: 571 [2022-01-18 15:19:27,218 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 15:19:27,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:19:27,219 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 158 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:27,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 245 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:27,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 15:19:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 372. [2022-01-18 15:19:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.0404312668463613) internal successors, (1128), 371 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1128 transitions. [2022-01-18 15:19:27,223 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1128 transitions. Word has length 20 [2022-01-18 15:19:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:27,223 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1128 transitions. [2022-01-18 15:19:27,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1128 transitions. [2022-01-18 15:19:27,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:27,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:27,224 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:27,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:27,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2022-01-18 15:19:27,424 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:27,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:27,424 INFO L85 PathProgramCache]: Analyzing trace with hash -409999546, now seen corresponding path program 290 times [2022-01-18 15:19:27,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:27,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331214787] [2022-01-18 15:19:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:27,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:27,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:27,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331214787] [2022-01-18 15:19:27,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331214787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:27,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043621584] [2022-01-18 15:19:27,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:27,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:27,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:27,529 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:27,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-01-18 15:19:27,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:27,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:27,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:27,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:27,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:19:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:27,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:28,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:28,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:28,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043621584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:28,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:28,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:28,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152852261] [2022-01-18 15:19:28,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:28,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:28,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:28,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:28,124 INFO L87 Difference]: Start difference. First operand 372 states and 1128 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:28,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:28,439 INFO L93 Difference]: Finished difference Result 540 states and 1578 transitions. [2022-01-18 15:19:28,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:28,439 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:28,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:28,440 INFO L225 Difference]: With dead ends: 540 [2022-01-18 15:19:28,440 INFO L226 Difference]: Without dead ends: 540 [2022-01-18 15:19:28,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:19:28,440 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:28,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 245 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-01-18 15:19:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 369. [2022-01-18 15:19:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.0244565217391304) internal successors, (1113), 368 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1113 transitions. [2022-01-18 15:19:28,444 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1113 transitions. Word has length 20 [2022-01-18 15:19:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:28,444 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1113 transitions. [2022-01-18 15:19:28,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:28,444 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1113 transitions. [2022-01-18 15:19:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:28,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:28,445 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:28,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-01-18 15:19:28,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:28,645 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:28,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash 570453586, now seen corresponding path program 291 times [2022-01-18 15:19:28,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:28,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971002588] [2022-01-18 15:19:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:28,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:28,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:28,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971002588] [2022-01-18 15:19:28,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971002588] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:28,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578652197] [2022-01-18 15:19:28,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:28,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:28,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:28,729 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:28,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-01-18 15:19:28,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:19:28,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:28,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:28,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:29,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:19:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:29,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:29,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:29,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:29,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578652197] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:29,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:29,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:29,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294274661] [2022-01-18 15:19:29,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:29,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:29,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:29,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:29,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:29,239 INFO L87 Difference]: Start difference. First operand 369 states and 1113 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:29,531 INFO L93 Difference]: Finished difference Result 537 states and 1526 transitions. [2022-01-18 15:19:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:29,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:29,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:29,532 INFO L225 Difference]: With dead ends: 537 [2022-01-18 15:19:29,532 INFO L226 Difference]: Without dead ends: 531 [2022-01-18 15:19:29,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:19:29,532 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 163 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:29,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 195 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:29,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-18 15:19:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 373. [2022-01-18 15:19:29,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.0295698924731185) internal successors, (1127), 372 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1127 transitions. [2022-01-18 15:19:29,536 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1127 transitions. Word has length 20 [2022-01-18 15:19:29,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:29,536 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1127 transitions. [2022-01-18 15:19:29,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1127 transitions. [2022-01-18 15:19:29,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:29,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:29,537 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:29,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-01-18 15:19:29,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:29,737 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:29,738 INFO L85 PathProgramCache]: Analyzing trace with hash 594353500, now seen corresponding path program 292 times [2022-01-18 15:19:29,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:29,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662407415] [2022-01-18 15:19:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:29,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:29,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:29,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662407415] [2022-01-18 15:19:29,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662407415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:29,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552659074] [2022-01-18 15:19:29,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:29,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:29,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:29,829 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:29,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-01-18 15:19:29,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:29,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:29,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:29,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:30,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:19:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:30,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:30,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:30,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:30,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552659074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:30,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:30,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:30,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636610606] [2022-01-18 15:19:30,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:30,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:30,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:30,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:30,365 INFO L87 Difference]: Start difference. First operand 373 states and 1127 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:30,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:30,725 INFO L93 Difference]: Finished difference Result 543 states and 1547 transitions. [2022-01-18 15:19:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:19:30,725 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:30,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:30,726 INFO L225 Difference]: With dead ends: 543 [2022-01-18 15:19:30,726 INFO L226 Difference]: Without dead ends: 543 [2022-01-18 15:19:30,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:19:30,726 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 140 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:30,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 281 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:30,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-18 15:19:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 370. [2022-01-18 15:19:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.02710027100271) internal successors, (1117), 369 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1117 transitions. [2022-01-18 15:19:30,731 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1117 transitions. Word has length 20 [2022-01-18 15:19:30,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:30,731 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1117 transitions. [2022-01-18 15:19:30,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1117 transitions. [2022-01-18 15:19:30,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:30,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:30,731 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:30,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-01-18 15:19:30,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-01-18 15:19:30,932 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:30,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:30,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1623134952, now seen corresponding path program 293 times [2022-01-18 15:19:30,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:30,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167640111] [2022-01-18 15:19:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:30,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:31,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:31,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167640111] [2022-01-18 15:19:31,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167640111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:31,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161288217] [2022-01-18 15:19:31,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:31,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:31,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:31,023 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:31,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-01-18 15:19:31,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:31,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:31,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:31,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:31,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:19:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:31,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:31,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:31,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:31,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161288217] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:31,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:31,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:31,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391008443] [2022-01-18 15:19:31,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:31,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:31,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:31,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:31,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:31,546 INFO L87 Difference]: Start difference. First operand 370 states and 1117 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:31,832 INFO L93 Difference]: Finished difference Result 476 states and 1404 transitions. [2022-01-18 15:19:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:31,832 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:31,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:31,833 INFO L225 Difference]: With dead ends: 476 [2022-01-18 15:19:31,833 INFO L226 Difference]: Without dead ends: 476 [2022-01-18 15:19:31,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:19:31,833 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:31,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 215 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-18 15:19:31,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 371. [2022-01-18 15:19:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.0243243243243243) internal successors, (1119), 370 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1119 transitions. [2022-01-18 15:19:31,837 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1119 transitions. Word has length 20 [2022-01-18 15:19:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:31,837 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1119 transitions. [2022-01-18 15:19:31,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1119 transitions. [2022-01-18 15:19:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:31,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:31,838 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:31,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:32,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:32,038 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:32,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:32,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1677456724, now seen corresponding path program 294 times [2022-01-18 15:19:32,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:32,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596234706] [2022-01-18 15:19:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:32,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:32,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:32,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596234706] [2022-01-18 15:19:32,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596234706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:32,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365680592] [2022-01-18 15:19:32,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:32,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:32,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:32,126 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:32,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-01-18 15:19:32,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:19:32,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:32,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:32,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:32,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:19:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:32,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:32,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:32,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:32,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365680592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:32,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:32,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:32,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143526171] [2022-01-18 15:19:32,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:32,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:32,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:32,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:32,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:32,670 INFO L87 Difference]: Start difference. First operand 371 states and 1119 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:32,989 INFO L93 Difference]: Finished difference Result 470 states and 1386 transitions. [2022-01-18 15:19:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:19:32,989 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:32,990 INFO L225 Difference]: With dead ends: 470 [2022-01-18 15:19:32,990 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 15:19:32,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:19:32,990 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 117 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:32,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 229 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 15:19:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 360. [2022-01-18 15:19:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.013927576601671) internal successors, (1082), 359 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1082 transitions. [2022-01-18 15:19:32,994 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1082 transitions. Word has length 20 [2022-01-18 15:19:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:32,994 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1082 transitions. [2022-01-18 15:19:32,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1082 transitions. [2022-01-18 15:19:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:32,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:32,995 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:33,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:33,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:33,207 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:33,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:33,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1972883906, now seen corresponding path program 295 times [2022-01-18 15:19:33,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:33,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964590195] [2022-01-18 15:19:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:33,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:33,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:33,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964590195] [2022-01-18 15:19:33,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964590195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:33,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556467289] [2022-01-18 15:19:33,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:33,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:33,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:33,283 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:33,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-01-18 15:19:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:33,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:33,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:33,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:33,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:33,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:33,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556467289] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:33,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:33,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:33,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745410520] [2022-01-18 15:19:33,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:33,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:33,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:33,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:33,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:33,819 INFO L87 Difference]: Start difference. First operand 360 states and 1082 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:34,072 INFO L93 Difference]: Finished difference Result 431 states and 1279 transitions. [2022-01-18 15:19:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:34,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:34,073 INFO L225 Difference]: With dead ends: 431 [2022-01-18 15:19:34,073 INFO L226 Difference]: Without dead ends: 431 [2022-01-18 15:19:34,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:19:34,073 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:34,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 181 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-18 15:19:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 357. [2022-01-18 15:19:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.00561797752809) internal successors, (1070), 356 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1070 transitions. [2022-01-18 15:19:34,077 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1070 transitions. Word has length 20 [2022-01-18 15:19:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:34,077 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1070 transitions. [2022-01-18 15:19:34,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1070 transitions. [2022-01-18 15:19:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:34,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:34,077 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:34,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-01-18 15:19:34,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:34,278 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:34,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:34,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1485535074, now seen corresponding path program 296 times [2022-01-18 15:19:34,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:34,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151664550] [2022-01-18 15:19:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:34,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:34,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:34,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151664550] [2022-01-18 15:19:34,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151664550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:34,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38906464] [2022-01-18 15:19:34,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:34,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:34,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:34,354 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:34,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-01-18 15:19:34,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:34,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:34,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:34,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:34,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:34,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:34,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:34,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:34,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38906464] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:34,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:34,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:34,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386683748] [2022-01-18 15:19:34,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:34,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:34,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:34,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:34,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:34,854 INFO L87 Difference]: Start difference. First operand 357 states and 1070 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:35,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:35,067 INFO L93 Difference]: Finished difference Result 438 states and 1269 transitions. [2022-01-18 15:19:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:35,068 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:35,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:35,068 INFO L225 Difference]: With dead ends: 438 [2022-01-18 15:19:35,068 INFO L226 Difference]: Without dead ends: 432 [2022-01-18 15:19:35,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:35,069 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 114 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:35,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 160 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:35,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-18 15:19:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 371. [2022-01-18 15:19:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.997297297297297) internal successors, (1109), 370 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1109 transitions. [2022-01-18 15:19:35,073 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1109 transitions. Word has length 20 [2022-01-18 15:19:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:35,073 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1109 transitions. [2022-01-18 15:19:35,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1109 transitions. [2022-01-18 15:19:35,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:35,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:35,073 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:35,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:35,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:35,273 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:35,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:35,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1509434988, now seen corresponding path program 297 times [2022-01-18 15:19:35,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:35,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061981126] [2022-01-18 15:19:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:35,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:35,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:35,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061981126] [2022-01-18 15:19:35,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061981126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:35,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834588674] [2022-01-18 15:19:35,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:35,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:35,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:35,355 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:35,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-01-18 15:19:35,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:19:35,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:35,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:35,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:35,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:35,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:35,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:35,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:35,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834588674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:35,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:35,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:35,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486879878] [2022-01-18 15:19:35,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:35,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:35,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:35,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:35,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:35,882 INFO L87 Difference]: Start difference. First operand 371 states and 1109 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:36,189 INFO L93 Difference]: Finished difference Result 444 states and 1290 transitions. [2022-01-18 15:19:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:19:36,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:36,190 INFO L225 Difference]: With dead ends: 444 [2022-01-18 15:19:36,190 INFO L226 Difference]: Without dead ends: 444 [2022-01-18 15:19:36,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:19:36,191 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 114 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:36,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 243 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:36,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-18 15:19:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 369. [2022-01-18 15:19:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.0) internal successors, (1104), 368 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1104 transitions. [2022-01-18 15:19:36,195 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1104 transitions. Word has length 20 [2022-01-18 15:19:36,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:36,195 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1104 transitions. [2022-01-18 15:19:36,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:36,195 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1104 transitions. [2022-01-18 15:19:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:36,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:36,195 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:36,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-01-18 15:19:36,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:36,411 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:36,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:36,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1302397370, now seen corresponding path program 298 times [2022-01-18 15:19:36,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:36,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96462446] [2022-01-18 15:19:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:36,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:36,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96462446] [2022-01-18 15:19:36,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96462446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583972947] [2022-01-18 15:19:36,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:36,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:36,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:36,484 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:36,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-01-18 15:19:36,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:36,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:36,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:36,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:36,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:36,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:36,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:36,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583972947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:36,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:36,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:19:36,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902804626] [2022-01-18 15:19:36,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:36,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:19:36,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:36,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:19:36,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:19:36,954 INFO L87 Difference]: Start difference. First operand 369 states and 1104 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:37,166 INFO L93 Difference]: Finished difference Result 413 states and 1225 transitions. [2022-01-18 15:19:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:37,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:37,167 INFO L225 Difference]: With dead ends: 413 [2022-01-18 15:19:37,167 INFO L226 Difference]: Without dead ends: 413 [2022-01-18 15:19:37,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:37,168 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 59 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:37,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 133 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:19:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-18 15:19:37,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 354. [2022-01-18 15:19:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.002832861189802) internal successors, (1060), 353 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:37,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1060 transitions. [2022-01-18 15:19:37,171 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1060 transitions. Word has length 20 [2022-01-18 15:19:37,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:37,171 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1060 transitions. [2022-01-18 15:19:37,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1060 transitions. [2022-01-18 15:19:37,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:37,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:37,172 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:37,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-01-18 15:19:37,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:37,372 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:37,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1257422514, now seen corresponding path program 299 times [2022-01-18 15:19:37,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:37,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709172825] [2022-01-18 15:19:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:37,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:37,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:37,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709172825] [2022-01-18 15:19:37,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709172825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:37,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169873677] [2022-01-18 15:19:37,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:37,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:37,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:37,467 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:37,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-01-18 15:19:37,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:37,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:37,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:37,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:37,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:19:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:37,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:38,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:38,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:38,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169873677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:38,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:38,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:38,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931644905] [2022-01-18 15:19:38,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:38,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:38,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:38,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:38,127 INFO L87 Difference]: Start difference. First operand 354 states and 1060 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:38,416 INFO L93 Difference]: Finished difference Result 414 states and 1209 transitions. [2022-01-18 15:19:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:38,416 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:38,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:38,416 INFO L225 Difference]: With dead ends: 414 [2022-01-18 15:19:38,417 INFO L226 Difference]: Without dead ends: 414 [2022-01-18 15:19:38,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:19:38,417 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 93 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:38,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 155 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-18 15:19:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 362. [2022-01-18 15:19:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0221606648199444) internal successors, (1091), 361 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1091 transitions. [2022-01-18 15:19:38,421 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1091 transitions. Word has length 20 [2022-01-18 15:19:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:38,421 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1091 transitions. [2022-01-18 15:19:38,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1091 transitions. [2022-01-18 15:19:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:38,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:38,421 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:38,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-01-18 15:19:38,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:38,622 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:38,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:38,622 INFO L85 PathProgramCache]: Analyzing trace with hash -375345080, now seen corresponding path program 300 times [2022-01-18 15:19:38,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:38,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799257429] [2022-01-18 15:19:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:38,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:38,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:38,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799257429] [2022-01-18 15:19:38,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799257429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:38,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469576343] [2022-01-18 15:19:38,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:38,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:38,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:38,714 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:38,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-01-18 15:19:38,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:19:38,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:38,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:38,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:39,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:19:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:39,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:39,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:39,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:39,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469576343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:39,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:39,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:39,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406655856] [2022-01-18 15:19:39,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:39,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:39,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:39,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:39,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:39,360 INFO L87 Difference]: Start difference. First operand 362 states and 1091 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:39,726 INFO L93 Difference]: Finished difference Result 420 states and 1216 transitions. [2022-01-18 15:19:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:19:39,727 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:39,727 INFO L225 Difference]: With dead ends: 420 [2022-01-18 15:19:39,727 INFO L226 Difference]: Without dead ends: 414 [2022-01-18 15:19:39,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:19:39,728 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:39,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 191 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-18 15:19:39,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 359. [2022-01-18 15:19:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.016759776536313) internal successors, (1080), 358 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:39,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1080 transitions. [2022-01-18 15:19:39,731 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1080 transitions. Word has length 20 [2022-01-18 15:19:39,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:39,731 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1080 transitions. [2022-01-18 15:19:39,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:39,732 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1080 transitions. [2022-01-18 15:19:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:39,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:39,732 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:39,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-01-18 15:19:39,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-01-18 15:19:39,932 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:39,933 INFO L85 PathProgramCache]: Analyzing trace with hash -910574882, now seen corresponding path program 301 times [2022-01-18 15:19:39,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:39,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954366333] [2022-01-18 15:19:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:39,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:40,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:40,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954366333] [2022-01-18 15:19:40,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954366333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:40,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841490920] [2022-01-18 15:19:40,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:40,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:40,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:40,033 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:40,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-01-18 15:19:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:40,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:40,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:40,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:40,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:40,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:40,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:40,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841490920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:40,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:40,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:40,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372025587] [2022-01-18 15:19:40,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:40,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:40,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:40,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:40,663 INFO L87 Difference]: Start difference. First operand 359 states and 1080 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:40,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:40,997 INFO L93 Difference]: Finished difference Result 384 states and 1134 transitions. [2022-01-18 15:19:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:40,997 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:40,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:40,997 INFO L225 Difference]: With dead ends: 384 [2022-01-18 15:19:40,997 INFO L226 Difference]: Without dead ends: 372 [2022-01-18 15:19:40,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:19:40,998 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:40,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 119 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:19:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-18 15:19:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 356. [2022-01-18 15:19:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.011267605633803) internal successors, (1069), 355 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1069 transitions. [2022-01-18 15:19:41,001 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1069 transitions. Word has length 20 [2022-01-18 15:19:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:41,001 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1069 transitions. [2022-01-18 15:19:41,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1069 transitions. [2022-01-18 15:19:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:41,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:41,002 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:41,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:41,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-01-18 15:19:41,202 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:41,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:41,203 INFO L85 PathProgramCache]: Analyzing trace with hash 235558360, now seen corresponding path program 302 times [2022-01-18 15:19:41,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:41,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87409835] [2022-01-18 15:19:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:41,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:41,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:41,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87409835] [2022-01-18 15:19:41,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87409835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:41,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572364082] [2022-01-18 15:19:41,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:41,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:41,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:41,442 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:41,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-01-18 15:19:41,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:41,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:41,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:41,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:41,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-01-18 15:19:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:41,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:42,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:42,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:42,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572364082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:42,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:42,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:42,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404729833] [2022-01-18 15:19:42,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:42,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:42,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:42,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:42,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:42,140 INFO L87 Difference]: Start difference. First operand 356 states and 1069 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:42,464 INFO L93 Difference]: Finished difference Result 501 states and 1427 transitions. [2022-01-18 15:19:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:42,464 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:42,465 INFO L225 Difference]: With dead ends: 501 [2022-01-18 15:19:42,465 INFO L226 Difference]: Without dead ends: 501 [2022-01-18 15:19:42,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:19:42,465 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 141 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:42,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 174 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-18 15:19:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 364. [2022-01-18 15:19:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.044077134986226) internal successors, (1105), 363 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1105 transitions. [2022-01-18 15:19:42,469 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1105 transitions. Word has length 20 [2022-01-18 15:19:42,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:42,469 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1105 transitions. [2022-01-18 15:19:42,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1105 transitions. [2022-01-18 15:19:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:42,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:42,470 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:42,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-01-18 15:19:42,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-01-18 15:19:42,670 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:42,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:42,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1117635794, now seen corresponding path program 303 times [2022-01-18 15:19:42,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:42,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413109335] [2022-01-18 15:19:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:42,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:42,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:42,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413109335] [2022-01-18 15:19:42,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413109335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:42,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93881750] [2022-01-18 15:19:42,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:42,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:42,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:42,815 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:42,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-01-18 15:19:42,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:19:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:42,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:43,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:19:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:43,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:43,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:43,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:43,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93881750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:43,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:43,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:43,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732018732] [2022-01-18 15:19:43,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:43,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:43,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:43,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:43,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:43,492 INFO L87 Difference]: Start difference. First operand 364 states and 1105 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:43,928 INFO L93 Difference]: Finished difference Result 530 states and 1473 transitions. [2022-01-18 15:19:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:19:43,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:43,929 INFO L225 Difference]: With dead ends: 530 [2022-01-18 15:19:43,929 INFO L226 Difference]: Without dead ends: 524 [2022-01-18 15:19:43,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:19:43,929 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 116 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:43,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 242 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-01-18 15:19:43,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 367. [2022-01-18 15:19:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.0245901639344264) internal successors, (1107), 366 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1107 transitions. [2022-01-18 15:19:43,934 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1107 transitions. Word has length 20 [2022-01-18 15:19:43,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:43,934 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1107 transitions. [2022-01-18 15:19:43,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:43,934 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1107 transitions. [2022-01-18 15:19:43,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:43,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:43,934 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:43,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-01-18 15:19:44,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:44,135 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:44,135 INFO L85 PathProgramCache]: Analyzing trace with hash 976455694, now seen corresponding path program 304 times [2022-01-18 15:19:44,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:44,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392471200] [2022-01-18 15:19:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:44,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:44,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:44,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392471200] [2022-01-18 15:19:44,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392471200] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:44,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538531635] [2022-01-18 15:19:44,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:44,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:44,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:44,248 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:44,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-01-18 15:19:44,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:44,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:44,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:19:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:44,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:44,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:44,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:44,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538531635] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:44,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:44,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:44,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790660528] [2022-01-18 15:19:44,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:44,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:44,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:44,953 INFO L87 Difference]: Start difference. First operand 367 states and 1107 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:45,285 INFO L93 Difference]: Finished difference Result 498 states and 1414 transitions. [2022-01-18 15:19:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:45,285 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:45,286 INFO L225 Difference]: With dead ends: 498 [2022-01-18 15:19:45,286 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 15:19:45,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:19:45,286 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 153 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:45,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 179 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:45,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 15:19:45,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 360. [2022-01-18 15:19:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.033426183844011) internal successors, (1089), 359 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1089 transitions. [2022-01-18 15:19:45,290 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1089 transitions. Word has length 20 [2022-01-18 15:19:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:45,290 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1089 transitions. [2022-01-18 15:19:45,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1089 transitions. [2022-01-18 15:19:45,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:45,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:45,291 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:45,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-01-18 15:19:45,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-01-18 15:19:45,491 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1970831314, now seen corresponding path program 305 times [2022-01-18 15:19:45,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:45,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672299705] [2022-01-18 15:19:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:45,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:45,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:45,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672299705] [2022-01-18 15:19:45,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672299705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:45,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387778956] [2022-01-18 15:19:45,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:45,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:45,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:45,604 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:45,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-01-18 15:19:45,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:45,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:45,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:45,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:45,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 87 [2022-01-18 15:19:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:46,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:46,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:46,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:46,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387778956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:46,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:46,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:46,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470828229] [2022-01-18 15:19:46,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:46,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:46,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:46,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:46,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:46,315 INFO L87 Difference]: Start difference. First operand 360 states and 1089 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:46,652 INFO L93 Difference]: Finished difference Result 465 states and 1337 transitions. [2022-01-18 15:19:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:19:46,652 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:46,653 INFO L225 Difference]: With dead ends: 465 [2022-01-18 15:19:46,653 INFO L226 Difference]: Without dead ends: 465 [2022-01-18 15:19:46,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:19:46,653 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 79 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:46,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 220 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-18 15:19:46,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 357. [2022-01-18 15:19:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.0168539325842696) internal successors, (1074), 356 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1074 transitions. [2022-01-18 15:19:46,657 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1074 transitions. Word has length 20 [2022-01-18 15:19:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:46,657 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1074 transitions. [2022-01-18 15:19:46,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1074 transitions. [2022-01-18 15:19:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:46,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:46,658 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:46,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-01-18 15:19:46,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:46,858 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:46,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1343682850, now seen corresponding path program 306 times [2022-01-18 15:19:46,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:46,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658067252] [2022-01-18 15:19:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:46,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:46,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:46,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658067252] [2022-01-18 15:19:46,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658067252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:46,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596104171] [2022-01-18 15:19:46,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:46,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:46,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:46,959 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:46,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-01-18 15:19:47,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:19:47,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:47,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:47,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:47,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 87 [2022-01-18 15:19:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:47,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:47,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:47,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:47,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596104171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:47,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:47,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:47,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819238474] [2022-01-18 15:19:47,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:47,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:47,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:47,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:47,629 INFO L87 Difference]: Start difference. First operand 357 states and 1074 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:48,108 INFO L93 Difference]: Finished difference Result 475 states and 1355 transitions. [2022-01-18 15:19:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:19:48,108 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:48,109 INFO L225 Difference]: With dead ends: 475 [2022-01-18 15:19:48,109 INFO L226 Difference]: Without dead ends: 469 [2022-01-18 15:19:48,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:19:48,109 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 111 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:48,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 222 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-18 15:19:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 367. [2022-01-18 15:19:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.0081967213114753) internal successors, (1101), 366 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1101 transitions. [2022-01-18 15:19:48,113 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1101 transitions. Word has length 20 [2022-01-18 15:19:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:48,113 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1101 transitions. [2022-01-18 15:19:48,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1101 transitions. [2022-01-18 15:19:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:48,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:48,114 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:48,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:48,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:48,314 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:48,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1319782936, now seen corresponding path program 307 times [2022-01-18 15:19:48,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:48,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905908675] [2022-01-18 15:19:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:48,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:48,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:48,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905908675] [2022-01-18 15:19:48,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905908675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:48,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788477127] [2022-01-18 15:19:48,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:48,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:48,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:48,422 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:48,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-01-18 15:19:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:48,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:48,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:48,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:19:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:48,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:48,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:48,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:49,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788477127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:49,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:49,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:49,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311768752] [2022-01-18 15:19:49,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:49,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:49,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:49,056 INFO L87 Difference]: Start difference. First operand 367 states and 1101 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:49,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:49,385 INFO L93 Difference]: Finished difference Result 446 states and 1301 transitions. [2022-01-18 15:19:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:49,385 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:49,386 INFO L225 Difference]: With dead ends: 446 [2022-01-18 15:19:49,386 INFO L226 Difference]: Without dead ends: 446 [2022-01-18 15:19:49,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:19:49,386 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:49,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 157 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-01-18 15:19:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 356. [2022-01-18 15:19:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.011267605633803) internal successors, (1069), 355 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1069 transitions. [2022-01-18 15:19:49,390 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1069 transitions. Word has length 20 [2022-01-18 15:19:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:49,390 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1069 transitions. [2022-01-18 15:19:49,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1069 transitions. [2022-01-18 15:19:49,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:49,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:49,391 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:49,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-01-18 15:19:49,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2022-01-18 15:19:49,591 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:49,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:49,591 INFO L85 PathProgramCache]: Analyzing trace with hash 97958482, now seen corresponding path program 308 times [2022-01-18 15:19:49,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:49,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103470857] [2022-01-18 15:19:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:49,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:49,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:49,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103470857] [2022-01-18 15:19:49,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103470857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:49,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071568072] [2022-01-18 15:19:49,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:49,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:49,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:49,686 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:49,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-01-18 15:19:49,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:49,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:50,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:19:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:50,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:50,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:50,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:50,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071568072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:50,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:50,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:50,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006423146] [2022-01-18 15:19:50,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:50,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:50,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:50,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:50,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:50,306 INFO L87 Difference]: Start difference. First operand 356 states and 1069 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:50,634 INFO L93 Difference]: Finished difference Result 386 states and 1138 transitions. [2022-01-18 15:19:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:50,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:50,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:50,635 INFO L225 Difference]: With dead ends: 386 [2022-01-18 15:19:50,635 INFO L226 Difference]: Without dead ends: 374 [2022-01-18 15:19:50,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:19:50,635 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:50,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 158 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:50,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-18 15:19:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 358. [2022-01-18 15:19:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.008403361344538) internal successors, (1074), 357 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1074 transitions. [2022-01-18 15:19:50,639 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1074 transitions. Word has length 20 [2022-01-18 15:19:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:50,639 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1074 transitions. [2022-01-18 15:19:50,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:50,639 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1074 transitions. [2022-01-18 15:19:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:50,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:50,640 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:50,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-01-18 15:19:50,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:50,840 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:50,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:50,840 INFO L85 PathProgramCache]: Analyzing trace with hash 838855816, now seen corresponding path program 309 times [2022-01-18 15:19:50,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:50,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944451096] [2022-01-18 15:19:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:50,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:50,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:50,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944451096] [2022-01-18 15:19:50,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944451096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:50,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533217940] [2022-01-18 15:19:50,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:50,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:50,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:50,938 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:50,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-01-18 15:19:51,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:19:51,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:51,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:51,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:19:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:51,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:51,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:51,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:51,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533217940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:51,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:51,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:51,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594861901] [2022-01-18 15:19:51,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:51,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:51,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:51,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:51,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:51,609 INFO L87 Difference]: Start difference. First operand 358 states and 1074 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:51,974 INFO L93 Difference]: Finished difference Result 411 states and 1190 transitions. [2022-01-18 15:19:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:51,974 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:51,975 INFO L225 Difference]: With dead ends: 411 [2022-01-18 15:19:51,975 INFO L226 Difference]: Without dead ends: 405 [2022-01-18 15:19:51,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:19:51,975 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 114 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:51,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 137 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:19:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-18 15:19:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 368. [2022-01-18 15:19:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0) internal successors, (1101), 367 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1101 transitions. [2022-01-18 15:19:51,979 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1101 transitions. Word has length 20 [2022-01-18 15:19:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:51,979 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1101 transitions. [2022-01-18 15:19:51,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1101 transitions. [2022-01-18 15:19:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:51,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:51,980 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:51,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:52,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-01-18 15:19:52,180 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:52,181 INFO L85 PathProgramCache]: Analyzing trace with hash 862755730, now seen corresponding path program 310 times [2022-01-18 15:19:52,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:52,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648957743] [2022-01-18 15:19:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:52,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:52,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:52,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648957743] [2022-01-18 15:19:52,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648957743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:52,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315179857] [2022-01-18 15:19:52,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:52,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:52,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:52,284 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:52,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-01-18 15:19:52,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:52,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:52,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:52,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:52,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:19:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:52,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:52,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:52,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:19:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:52,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315179857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:52,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:52,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:52,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966721063] [2022-01-18 15:19:52,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:52,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:52,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:52,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:52,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:52,968 INFO L87 Difference]: Start difference. First operand 368 states and 1101 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:53,285 INFO L93 Difference]: Finished difference Result 382 states and 1136 transitions. [2022-01-18 15:19:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:53,285 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:53,286 INFO L225 Difference]: With dead ends: 382 [2022-01-18 15:19:53,286 INFO L226 Difference]: Without dead ends: 382 [2022-01-18 15:19:53,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:19:53,286 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:53,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 148 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:53,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-01-18 15:19:53,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 355. [2022-01-18 15:19:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.005649717514124) internal successors, (1064), 354 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1064 transitions. [2022-01-18 15:19:53,289 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1064 transitions. Word has length 20 [2022-01-18 15:19:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:53,289 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1064 transitions. [2022-01-18 15:19:53,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:53,289 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1064 transitions. [2022-01-18 15:19:53,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:53,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:53,290 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:53,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-01-18 15:19:53,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-01-18 15:19:53,490 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:53,491 INFO L85 PathProgramCache]: Analyzing trace with hash -400908494, now seen corresponding path program 311 times [2022-01-18 15:19:53,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:53,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644968359] [2022-01-18 15:19:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:53,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:53,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:53,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644968359] [2022-01-18 15:19:53,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644968359] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:53,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689515025] [2022-01-18 15:19:53,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:53,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:53,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:53,583 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:53,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-01-18 15:19:53,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:53,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:53,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:53,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:19:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:54,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:54,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:54,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:54,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689515025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:54,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:54,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:54,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693248395] [2022-01-18 15:19:54,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:54,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:54,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:54,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:54,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:54,209 INFO L87 Difference]: Start difference. First operand 355 states and 1064 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:54,445 INFO L93 Difference]: Finished difference Result 459 states and 1338 transitions. [2022-01-18 15:19:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:54,446 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:54,446 INFO L225 Difference]: With dead ends: 459 [2022-01-18 15:19:54,446 INFO L226 Difference]: Without dead ends: 459 [2022-01-18 15:19:54,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:19:54,446 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 117 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:54,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 162 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:54,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-18 15:19:54,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 365. [2022-01-18 15:19:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0467032967032965) internal successors, (1109), 364 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1109 transitions. [2022-01-18 15:19:54,450 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1109 transitions. Word has length 20 [2022-01-18 15:19:54,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:54,450 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 1109 transitions. [2022-01-18 15:19:54,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1109 transitions. [2022-01-18 15:19:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:54,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:54,451 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:54,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:54,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-01-18 15:19:54,651 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash 481168940, now seen corresponding path program 312 times [2022-01-18 15:19:54,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:54,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184847846] [2022-01-18 15:19:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:54,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:54,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:54,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184847846] [2022-01-18 15:19:54,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184847846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:54,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034884667] [2022-01-18 15:19:54,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:54,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:54,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:54,738 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:54,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-01-18 15:19:54,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:19:54,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:54,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:54,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:55,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:19:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:55,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:55,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:55,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:55,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034884667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:55,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:55,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:55,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864375820] [2022-01-18 15:19:55,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:55,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:55,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:55,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:55,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:55,336 INFO L87 Difference]: Start difference. First operand 365 states and 1109 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:55,602 INFO L93 Difference]: Finished difference Result 488 states and 1384 transitions. [2022-01-18 15:19:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:19:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:55,603 INFO L225 Difference]: With dead ends: 488 [2022-01-18 15:19:55,603 INFO L226 Difference]: Without dead ends: 482 [2022-01-18 15:19:55,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:19:55,603 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 129 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:55,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 180 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-18 15:19:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 368. [2022-01-18 15:19:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.02724795640327) internal successors, (1111), 367 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1111 transitions. [2022-01-18 15:19:55,607 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1111 transitions. Word has length 20 [2022-01-18 15:19:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:55,607 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1111 transitions. [2022-01-18 15:19:55,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1111 transitions. [2022-01-18 15:19:55,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:55,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:55,608 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:55,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:55,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:55,808 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:55,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash 339988840, now seen corresponding path program 313 times [2022-01-18 15:19:55,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:55,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877073976] [2022-01-18 15:19:55,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:55,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:55,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:55,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877073976] [2022-01-18 15:19:55,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877073976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:55,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917052156] [2022-01-18 15:19:55,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:55,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:55,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:55,905 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:55,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-01-18 15:19:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:56,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:56,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:56,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:19:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:56,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:56,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:56,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:56,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917052156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:56,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:56,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:56,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955361649] [2022-01-18 15:19:56,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:56,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:56,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:56,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:56,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:56,528 INFO L87 Difference]: Start difference. First operand 368 states and 1111 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:56,849 INFO L93 Difference]: Finished difference Result 517 states and 1481 transitions. [2022-01-18 15:19:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:56,850 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:56,850 INFO L225 Difference]: With dead ends: 517 [2022-01-18 15:19:56,850 INFO L226 Difference]: Without dead ends: 517 [2022-01-18 15:19:56,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:19:56,851 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:56,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 208 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-18 15:19:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 371. [2022-01-18 15:19:56,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.0432432432432432) internal successors, (1126), 370 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1126 transitions. [2022-01-18 15:19:56,855 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1126 transitions. Word has length 20 [2022-01-18 15:19:56,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:56,855 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1126 transitions. [2022-01-18 15:19:56,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:56,855 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1126 transitions. [2022-01-18 15:19:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:56,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:56,856 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:56,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-01-18 15:19:57,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:57,056 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:57,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:57,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1334364460, now seen corresponding path program 314 times [2022-01-18 15:19:57,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:57,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216551717] [2022-01-18 15:19:57,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:57,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:57,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:57,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216551717] [2022-01-18 15:19:57,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216551717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:57,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426773022] [2022-01-18 15:19:57,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:57,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:57,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:57,155 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:57,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-01-18 15:19:57,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:57,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:57,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:57,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:57,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:19:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:57,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:57,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:57,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:57,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426773022] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:57,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:57,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:19:57,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439521315] [2022-01-18 15:19:57,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:57,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:57,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:57,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:57,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:57,773 INFO L87 Difference]: Start difference. First operand 371 states and 1126 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:58,147 INFO L93 Difference]: Finished difference Result 513 states and 1470 transitions. [2022-01-18 15:19:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:19:58,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:58,148 INFO L225 Difference]: With dead ends: 513 [2022-01-18 15:19:58,148 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 15:19:58,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:19:58,148 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:58,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 253 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 15:19:58,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 368. [2022-01-18 15:19:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.02724795640327) internal successors, (1111), 367 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1111 transitions. [2022-01-18 15:19:58,161 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1111 transitions. Word has length 20 [2022-01-18 15:19:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:58,161 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1111 transitions. [2022-01-18 15:19:58,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:58,161 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1111 transitions. [2022-01-18 15:19:58,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:58,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:58,161 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:58,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-01-18 15:19:58,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-01-18 15:19:58,362 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:58,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1980149704, now seen corresponding path program 315 times [2022-01-18 15:19:58,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:58,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108291614] [2022-01-18 15:19:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:58,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:58,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:58,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108291614] [2022-01-18 15:19:58,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108291614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:58,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614333487] [2022-01-18 15:19:58,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:58,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:58,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:58,451 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:58,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-01-18 15:19:58,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:19:58,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:58,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:58,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:58,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:19:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:58,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:58,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:58,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:19:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:59,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614333487] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:59,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:59,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:19:59,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8715802] [2022-01-18 15:19:59,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:59,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:59,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:59,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:59,026 INFO L87 Difference]: Start difference. First operand 368 states and 1111 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:59,347 INFO L93 Difference]: Finished difference Result 505 states and 1433 transitions. [2022-01-18 15:19:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:59,347 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:19:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:59,348 INFO L225 Difference]: With dead ends: 505 [2022-01-18 15:19:59,348 INFO L226 Difference]: Without dead ends: 499 [2022-01-18 15:19:59,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:19:59,348 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 127 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:59,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 200 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:19:59,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-18 15:19:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 372. [2022-01-18 15:19:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.032345013477089) internal successors, (1125), 371 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1125 transitions. [2022-01-18 15:19:59,353 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1125 transitions. Word has length 20 [2022-01-18 15:19:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:59,353 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1125 transitions. [2022-01-18 15:19:59,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1125 transitions. [2022-01-18 15:19:59,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:19:59,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:59,353 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:59,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-01-18 15:19:59,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-01-18 15:19:59,554 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:59,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:59,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1956249790, now seen corresponding path program 316 times [2022-01-18 15:19:59,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:59,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631743659] [2022-01-18 15:19:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:59,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:59,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:59,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631743659] [2022-01-18 15:19:59,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631743659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:59,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678895543] [2022-01-18 15:19:59,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:59,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:59,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:59,653 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:59,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-01-18 15:19:59,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:59,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:59,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:59,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:20:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:00,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:00,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:00,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:20:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:00,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678895543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:00,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:00,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:00,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688085917] [2022-01-18 15:20:00,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:00,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:00,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:00,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:00,251 INFO L87 Difference]: Start difference. First operand 372 states and 1125 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:00,584 INFO L93 Difference]: Finished difference Result 488 states and 1415 transitions. [2022-01-18 15:20:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:20:00,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:00,585 INFO L225 Difference]: With dead ends: 488 [2022-01-18 15:20:00,585 INFO L226 Difference]: Without dead ends: 488 [2022-01-18 15:20:00,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:20:00,586 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 96 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:00,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 238 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:00,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-18 15:20:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 369. [2022-01-18 15:20:00,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.029891304347826) internal successors, (1115), 368 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1115 transitions. [2022-01-18 15:20:00,590 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1115 transitions. Word has length 20 [2022-01-18 15:20:00,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:00,590 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1115 transitions. [2022-01-18 15:20:00,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1115 transitions. [2022-01-18 15:20:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:00,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:00,590 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:00,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-01-18 15:20:00,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:00,791 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:00,791 INFO L85 PathProgramCache]: Analyzing trace with hash -927468338, now seen corresponding path program 317 times [2022-01-18 15:20:00,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:00,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243758451] [2022-01-18 15:20:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:00,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:00,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:00,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243758451] [2022-01-18 15:20:00,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243758451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:00,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269472663] [2022-01-18 15:20:00,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:00,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:00,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:00,932 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:00,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-01-18 15:20:01,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:20:01,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:01,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:01,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:20:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:01,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:01,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:01,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:20:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:01,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269472663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:01,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:01,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:01,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835145978] [2022-01-18 15:20:01,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:01,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:01,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:01,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:01,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:01,526 INFO L87 Difference]: Start difference. First operand 369 states and 1115 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:01,808 INFO L93 Difference]: Finished difference Result 441 states and 1299 transitions. [2022-01-18 15:20:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:01,809 INFO L225 Difference]: With dead ends: 441 [2022-01-18 15:20:01,809 INFO L226 Difference]: Without dead ends: 441 [2022-01-18 15:20:01,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:01,810 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 76 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:01,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 181 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-01-18 15:20:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 370. [2022-01-18 15:20:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.02710027100271) internal successors, (1117), 369 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1117 transitions. [2022-01-18 15:20:01,813 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1117 transitions. Word has length 20 [2022-01-18 15:20:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:01,814 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1117 transitions. [2022-01-18 15:20:01,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1117 transitions. [2022-01-18 15:20:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:01,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:01,814 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:01,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:02,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:02,015 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:02,015 INFO L85 PathProgramCache]: Analyzing trace with hash 66907282, now seen corresponding path program 318 times [2022-01-18 15:20:02,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:02,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205716966] [2022-01-18 15:20:02,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:02,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:02,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:02,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205716966] [2022-01-18 15:20:02,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205716966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:02,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745538833] [2022-01-18 15:20:02,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:02,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:02,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:02,112 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:02,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-01-18 15:20:02,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:20:02,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:02,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:02,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:02,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-01-18 15:20:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:02,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:02,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:02,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:20:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:02,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745538833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:02,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:02,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:02,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943307403] [2022-01-18 15:20:02,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:02,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:02,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:02,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:02,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:02,769 INFO L87 Difference]: Start difference. First operand 370 states and 1117 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:03,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:03,109 INFO L93 Difference]: Finished difference Result 462 states and 1337 transitions. [2022-01-18 15:20:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:20:03,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:03,110 INFO L225 Difference]: With dead ends: 462 [2022-01-18 15:20:03,110 INFO L226 Difference]: Without dead ends: 462 [2022-01-18 15:20:03,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:20:03,111 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 111 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:03,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 204 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-18 15:20:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 359. [2022-01-18 15:20:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.016759776536313) internal successors, (1080), 358 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1080 transitions. [2022-01-18 15:20:03,114 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1080 transitions. Word has length 20 [2022-01-18 15:20:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:03,115 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1080 transitions. [2022-01-18 15:20:03,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:03,115 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1080 transitions. [2022-01-18 15:20:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:03,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:03,115 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:03,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-01-18 15:20:03,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:03,316 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:03,316 INFO L85 PathProgramCache]: Analyzing trace with hash -228519900, now seen corresponding path program 319 times [2022-01-18 15:20:03,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:03,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72936469] [2022-01-18 15:20:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:03,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:03,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:03,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72936469] [2022-01-18 15:20:03,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72936469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:03,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046159185] [2022-01-18 15:20:03,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:03,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:03,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:03,397 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:03,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-01-18 15:20:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:03,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:03,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:03,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:03,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:03,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:20:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:03,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046159185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:03,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:03,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:03,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627734364] [2022-01-18 15:20:03,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:03,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:03,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:03,983 INFO L87 Difference]: Start difference. First operand 359 states and 1080 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:04,228 INFO L93 Difference]: Finished difference Result 384 states and 1144 transitions. [2022-01-18 15:20:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:04,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:04,229 INFO L225 Difference]: With dead ends: 384 [2022-01-18 15:20:04,229 INFO L226 Difference]: Without dead ends: 384 [2022-01-18 15:20:04,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:04,229 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:04,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 149 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-18 15:20:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 356. [2022-01-18 15:20:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.008450704225352) internal successors, (1068), 355 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1068 transitions. [2022-01-18 15:20:04,233 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1068 transitions. Word has length 20 [2022-01-18 15:20:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:04,233 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1068 transitions. [2022-01-18 15:20:04,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1068 transitions. [2022-01-18 15:20:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:04,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:04,233 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:04,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-01-18 15:20:04,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-01-18 15:20:04,433 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:04,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1065068216, now seen corresponding path program 320 times [2022-01-18 15:20:04,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:04,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819603064] [2022-01-18 15:20:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:04,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:04,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:04,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819603064] [2022-01-18 15:20:04,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819603064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:04,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300380813] [2022-01-18 15:20:04,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:04,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:04,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:04,505 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:04,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-01-18 15:20:04,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:04,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:04,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:04,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:04,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:04,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:04,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:04,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:20:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:05,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300380813] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:05,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:05,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:20:05,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720248135] [2022-01-18 15:20:05,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:05,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:20:05,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:05,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:20:05,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:20:05,040 INFO L87 Difference]: Start difference. First operand 356 states and 1068 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:05,222 INFO L93 Difference]: Finished difference Result 429 states and 1238 transitions. [2022-01-18 15:20:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:05,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:05,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:05,223 INFO L225 Difference]: With dead ends: 429 [2022-01-18 15:20:05,223 INFO L226 Difference]: Without dead ends: 423 [2022-01-18 15:20:05,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:05,223 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 76 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:05,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 113 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:20:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-18 15:20:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 370. [2022-01-18 15:20:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.0) internal successors, (1107), 369 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:05,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1107 transitions. [2022-01-18 15:20:05,227 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1107 transitions. Word has length 20 [2022-01-18 15:20:05,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:05,227 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1107 transitions. [2022-01-18 15:20:05,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1107 transitions. [2022-01-18 15:20:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:05,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:05,227 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:05,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:05,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-01-18 15:20:05,428 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:05,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:05,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1041168302, now seen corresponding path program 321 times [2022-01-18 15:20:05,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:05,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940083021] [2022-01-18 15:20:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:05,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:05,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:05,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940083021] [2022-01-18 15:20:05,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940083021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:05,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913379259] [2022-01-18 15:20:05,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:05,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:05,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:05,503 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:05,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-01-18 15:20:05,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:20:05,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:05,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:05,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:05,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:05,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:06,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:06,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:20:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:06,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913379259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:06,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:06,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:20:06,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596097481] [2022-01-18 15:20:06,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:06,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:06,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:06,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:06,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:06,063 INFO L87 Difference]: Start difference. First operand 370 states and 1107 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:06,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:06,266 INFO L93 Difference]: Finished difference Result 435 states and 1259 transitions. [2022-01-18 15:20:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:20:06,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:06,267 INFO L225 Difference]: With dead ends: 435 [2022-01-18 15:20:06,267 INFO L226 Difference]: Without dead ends: 435 [2022-01-18 15:20:06,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:06,267 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:06,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 136 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:20:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-01-18 15:20:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 368. [2022-01-18 15:20:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.002724795640327) internal successors, (1102), 367 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1102 transitions. [2022-01-18 15:20:06,271 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1102 transitions. Word has length 20 [2022-01-18 15:20:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:06,271 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1102 transitions. [2022-01-18 15:20:06,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1102 transitions. [2022-01-18 15:20:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:06,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:06,271 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:06,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:06,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-01-18 15:20:06,472 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:06,472 INFO L85 PathProgramCache]: Analyzing trace with hash 441966636, now seen corresponding path program 322 times [2022-01-18 15:20:06,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:06,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015041699] [2022-01-18 15:20:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:06,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:06,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:06,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015041699] [2022-01-18 15:20:06,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015041699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:06,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663557590] [2022-01-18 15:20:06,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:06,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:06,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:06,552 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:06,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-01-18 15:20:06,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:06,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:06,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:06,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:06,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:07,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:07,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:20:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:07,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663557590] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:07,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:07,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:07,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455843479] [2022-01-18 15:20:07,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:07,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:07,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:07,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:07,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:07,115 INFO L87 Difference]: Start difference. First operand 368 states and 1102 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:07,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:07,363 INFO L93 Difference]: Finished difference Result 404 states and 1194 transitions. [2022-01-18 15:20:07,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:07,364 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:07,364 INFO L225 Difference]: With dead ends: 404 [2022-01-18 15:20:07,364 INFO L226 Difference]: Without dead ends: 404 [2022-01-18 15:20:07,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:07,365 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:07,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 170 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-18 15:20:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 355. [2022-01-18 15:20:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.005649717514124) internal successors, (1064), 354 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1064 transitions. [2022-01-18 15:20:07,368 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1064 transitions. Word has length 20 [2022-01-18 15:20:07,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:07,368 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1064 transitions. [2022-01-18 15:20:07,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:07,368 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1064 transitions. [2022-01-18 15:20:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:07,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:07,369 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:07,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-01-18 15:20:07,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-01-18 15:20:07,569 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:07,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1599286462, now seen corresponding path program 323 times [2022-01-18 15:20:07,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:07,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918505022] [2022-01-18 15:20:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:07,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:07,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:07,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918505022] [2022-01-18 15:20:07,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918505022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:07,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588194195] [2022-01-18 15:20:07,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:07,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:07,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:07,648 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:07,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-01-18 15:20:07,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:07,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:07,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:07,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:07,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:08,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:08,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:08,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:20:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:08,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588194195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:08,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:08,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:20:08,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481822286] [2022-01-18 15:20:08,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:08,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:08,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:08,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:08,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:08,184 INFO L87 Difference]: Start difference. First operand 355 states and 1064 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:08,429 INFO L93 Difference]: Finished difference Result 374 states and 1105 transitions. [2022-01-18 15:20:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:08,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:08,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:08,429 INFO L225 Difference]: With dead ends: 374 [2022-01-18 15:20:08,429 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 15:20:08,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:08,430 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:08,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 143 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:20:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 15:20:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 359. [2022-01-18 15:20:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.0) internal successors, (1074), 358 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1074 transitions. [2022-01-18 15:20:08,433 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1074 transitions. Word has length 20 [2022-01-18 15:20:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:08,433 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1074 transitions. [2022-01-18 15:20:08,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1074 transitions. [2022-01-18 15:20:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:08,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:08,434 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:08,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-01-18 15:20:08,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:08,634 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:08,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:08,634 INFO L85 PathProgramCache]: Analyzing trace with hash -858389128, now seen corresponding path program 324 times [2022-01-18 15:20:08,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:08,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958497665] [2022-01-18 15:20:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:08,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:08,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:08,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958497665] [2022-01-18 15:20:08,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958497665] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:08,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124777459] [2022-01-18 15:20:08,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:08,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:08,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:08,719 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:08,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-01-18 15:20:08,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:20:08,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:08,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:08,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:09,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:20:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:09,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:09,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:09,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:20:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:09,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124777459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:09,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:09,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:20:09,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464685730] [2022-01-18 15:20:09,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:09,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:09,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:09,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:09,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:09,272 INFO L87 Difference]: Start difference. First operand 359 states and 1074 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:09,564 INFO L93 Difference]: Finished difference Result 399 states and 1157 transitions. [2022-01-18 15:20:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:20:09,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:09,565 INFO L225 Difference]: With dead ends: 399 [2022-01-18 15:20:09,565 INFO L226 Difference]: Without dead ends: 393 [2022-01-18 15:20:09,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:09,565 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 81 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:09,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 149 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:20:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-18 15:20:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 369. [2022-01-18 15:20:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.9918478260869565) internal successors, (1101), 368 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1101 transitions. [2022-01-18 15:20:09,569 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1101 transitions. Word has length 20 [2022-01-18 15:20:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:09,569 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1101 transitions. [2022-01-18 15:20:09,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1101 transitions. [2022-01-18 15:20:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:09,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:09,569 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:09,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-01-18 15:20:09,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2022-01-18 15:20:09,770 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -834489214, now seen corresponding path program 325 times [2022-01-18 15:20:09,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:09,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728656688] [2022-01-18 15:20:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:09,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:09,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728656688] [2022-01-18 15:20:09,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728656688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:09,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851348324] [2022-01-18 15:20:09,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:09,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:09,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:09,838 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:09,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-01-18 15:20:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:10,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:10,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:10,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:20:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:10,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:10,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:10,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:20:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:10,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851348324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:10,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:10,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:20:10,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674262399] [2022-01-18 15:20:10,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:10,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:20:10,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:10,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:20:10,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:20:10,363 INFO L87 Difference]: Start difference. First operand 369 states and 1101 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:10,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:10,506 INFO L93 Difference]: Finished difference Result 370 states and 1103 transitions. [2022-01-18 15:20:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:10,506 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:10,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:10,507 INFO L225 Difference]: With dead ends: 370 [2022-01-18 15:20:10,507 INFO L226 Difference]: Without dead ends: 370 [2022-01-18 15:20:10,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:10,507 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:10,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 90 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:20:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-18 15:20:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 357. [2022-01-18 15:20:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.002808988764045) internal successors, (1069), 356 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1069 transitions. [2022-01-18 15:20:10,511 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1069 transitions. Word has length 20 [2022-01-18 15:20:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:10,511 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1069 transitions. [2022-01-18 15:20:10,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1069 transitions. [2022-01-18 15:20:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:10,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:10,511 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:10,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:10,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:10,711 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:10,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2125846306, now seen corresponding path program 326 times [2022-01-18 15:20:10,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:10,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609465641] [2022-01-18 15:20:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:10,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:10,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:10,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609465641] [2022-01-18 15:20:10,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609465641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:10,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187748484] [2022-01-18 15:20:10,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:10,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:10,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:10,775 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:10,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-01-18 15:20:10,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:10,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:10,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:10,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:11,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:11,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:11,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:11,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:20:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:11,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187748484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:11,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:11,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:20:11,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349755934] [2022-01-18 15:20:11,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:11,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:20:11,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:11,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:20:11,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:20:11,236 INFO L87 Difference]: Start difference. First operand 357 states and 1069 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:11,421 INFO L93 Difference]: Finished difference Result 405 states and 1172 transitions. [2022-01-18 15:20:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:11,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:11,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:11,422 INFO L225 Difference]: With dead ends: 405 [2022-01-18 15:20:11,422 INFO L226 Difference]: Without dead ends: 399 [2022-01-18 15:20:11,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:11,422 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:11,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 135 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:20:11,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-01-18 15:20:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 371. [2022-01-18 15:20:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.9945945945945946) internal successors, (1108), 370 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1108 transitions. [2022-01-18 15:20:11,426 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1108 transitions. Word has length 20 [2022-01-18 15:20:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:11,426 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1108 transitions. [2022-01-18 15:20:11,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:11,426 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1108 transitions. [2022-01-18 15:20:11,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:11,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:11,427 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:11,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:11,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:11,627 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:11,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:11,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2101946392, now seen corresponding path program 327 times [2022-01-18 15:20:11,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:11,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407401579] [2022-01-18 15:20:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:11,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:11,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:11,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407401579] [2022-01-18 15:20:11,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407401579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:11,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41592285] [2022-01-18 15:20:11,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:11,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:11,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:11,713 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:11,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-01-18 15:20:11,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:20:11,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:11,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:11,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:11,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:12,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:12,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:12,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:20:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:12,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41592285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:12,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:12,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:12,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563740181] [2022-01-18 15:20:12,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:12,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:12,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:12,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:12,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:12,195 INFO L87 Difference]: Start difference. First operand 371 states and 1108 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:12,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:12,423 INFO L93 Difference]: Finished difference Result 405 states and 1178 transitions. [2022-01-18 15:20:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:20:12,423 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:12,423 INFO L225 Difference]: With dead ends: 405 [2022-01-18 15:20:12,423 INFO L226 Difference]: Without dead ends: 405 [2022-01-18 15:20:12,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:12,424 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:12,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 188 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:12,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-18 15:20:12,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 369. [2022-01-18 15:20:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.9972826086956523) internal successors, (1103), 368 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1103 transitions. [2022-01-18 15:20:12,427 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1103 transitions. Word has length 20 [2022-01-18 15:20:12,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:12,427 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1103 transitions. [2022-01-18 15:20:12,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:12,427 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1103 transitions. [2022-01-18 15:20:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:12,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:12,428 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:12,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-01-18 15:20:12,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2022-01-18 15:20:12,628 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash -618811454, now seen corresponding path program 328 times [2022-01-18 15:20:12,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:12,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66195296] [2022-01-18 15:20:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:12,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:12,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:12,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66195296] [2022-01-18 15:20:12,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66195296] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:12,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395771973] [2022-01-18 15:20:12,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:12,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:12,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:12,694 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:12,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-01-18 15:20:12,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:12,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:12,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:12,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:12,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:13,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:13,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:20:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:13,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395771973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:13,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:13,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:20:13,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878076495] [2022-01-18 15:20:13,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:13,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:20:13,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:13,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:20:13,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:20:13,125 INFO L87 Difference]: Start difference. First operand 369 states and 1103 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:13,304 INFO L93 Difference]: Finished difference Result 380 states and 1128 transitions. [2022-01-18 15:20:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:13,305 INFO L225 Difference]: With dead ends: 380 [2022-01-18 15:20:13,305 INFO L226 Difference]: Without dead ends: 380 [2022-01-18 15:20:13,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:13,305 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:13,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 138 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:20:13,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-18 15:20:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 352. [2022-01-18 15:20:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.0028490028490027) internal successors, (1054), 351 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1054 transitions. [2022-01-18 15:20:13,309 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1054 transitions. Word has length 20 [2022-01-18 15:20:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:13,309 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 1054 transitions. [2022-01-18 15:20:13,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1054 transitions. [2022-01-18 15:20:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:13,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:13,309 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:13,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:13,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:13,510 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:13,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1305061192, now seen corresponding path program 329 times [2022-01-18 15:20:13,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:13,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138164116] [2022-01-18 15:20:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:13,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:13,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:13,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138164116] [2022-01-18 15:20:13,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138164116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:13,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919215552] [2022-01-18 15:20:13,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:13,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:13,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:13,615 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:13,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-01-18 15:20:13,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:20:13,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:13,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:13,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:13,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:13,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:14,113 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:14,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:14,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919215552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:14,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:14,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:20:14,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898251605] [2022-01-18 15:20:14,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:14,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:14,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:14,118 INFO L87 Difference]: Start difference. First operand 352 states and 1054 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:14,376 INFO L93 Difference]: Finished difference Result 530 states and 1523 transitions. [2022-01-18 15:20:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:14,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:14,377 INFO L225 Difference]: With dead ends: 530 [2022-01-18 15:20:14,377 INFO L226 Difference]: Without dead ends: 530 [2022-01-18 15:20:14,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:14,377 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 119 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:14,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 179 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-18 15:20:14,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 364. [2022-01-18 15:20:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.0165289256198347) internal successors, (1095), 363 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1095 transitions. [2022-01-18 15:20:14,382 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1095 transitions. Word has length 20 [2022-01-18 15:20:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:14,382 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1095 transitions. [2022-01-18 15:20:14,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1095 transitions. [2022-01-18 15:20:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:14,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:14,382 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:14,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-01-18 15:20:14,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:14,583 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:14,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:14,583 INFO L85 PathProgramCache]: Analyzing trace with hash 719820798, now seen corresponding path program 330 times [2022-01-18 15:20:14,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:14,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165845473] [2022-01-18 15:20:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:14,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:14,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:14,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165845473] [2022-01-18 15:20:14,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165845473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:14,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679151781] [2022-01-18 15:20:14,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:14,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:14,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:14,660 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:14,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-01-18 15:20:14,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:20:14,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:14,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:14,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:15,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:15,161 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:15,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:15,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679151781] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:15,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:15,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:15,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182976970] [2022-01-18 15:20:15,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:15,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:15,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:15,166 INFO L87 Difference]: Start difference. First operand 364 states and 1095 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:15,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:15,532 INFO L93 Difference]: Finished difference Result 564 states and 1606 transitions. [2022-01-18 15:20:15,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:20:15,533 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:15,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:15,533 INFO L225 Difference]: With dead ends: 564 [2022-01-18 15:20:15,533 INFO L226 Difference]: Without dead ends: 564 [2022-01-18 15:20:15,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:20:15,534 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 174 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:15,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 236 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-18 15:20:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 370. [2022-01-18 15:20:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.035230352303523) internal successors, (1120), 369 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1120 transitions. [2022-01-18 15:20:15,538 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1120 transitions. Word has length 20 [2022-01-18 15:20:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:15,538 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1120 transitions. [2022-01-18 15:20:15,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1120 transitions. [2022-01-18 15:20:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:15,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:15,539 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:15,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-01-18 15:20:15,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-01-18 15:20:15,739 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1601898232, now seen corresponding path program 331 times [2022-01-18 15:20:15,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:15,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244953294] [2022-01-18 15:20:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:15,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:15,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:15,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244953294] [2022-01-18 15:20:15,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244953294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:15,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913813162] [2022-01-18 15:20:15,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:15,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:15,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:15,814 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:15,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-01-18 15:20:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:15,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:16,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:16,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:16,299 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:16,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:16,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913813162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:16,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:16,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:20:16,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115192205] [2022-01-18 15:20:16,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:16,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:16,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:16,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:16,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:16,304 INFO L87 Difference]: Start difference. First operand 370 states and 1120 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:16,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:16,543 INFO L93 Difference]: Finished difference Result 521 states and 1497 transitions. [2022-01-18 15:20:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:16,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:16,544 INFO L225 Difference]: With dead ends: 521 [2022-01-18 15:20:16,544 INFO L226 Difference]: Without dead ends: 515 [2022-01-18 15:20:16,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:16,544 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 110 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:16,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 181 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:16,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-18 15:20:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 368. [2022-01-18 15:20:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0217983651226157) internal successors, (1109), 367 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1109 transitions. [2022-01-18 15:20:16,548 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1109 transitions. Word has length 20 [2022-01-18 15:20:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:16,548 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1109 transitions. [2022-01-18 15:20:16,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1109 transitions. [2022-01-18 15:20:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:16,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:16,549 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:16,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-01-18 15:20:16,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:16,749 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:16,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1739812181, now seen corresponding path program 332 times [2022-01-18 15:20:16,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:16,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712040486] [2022-01-18 15:20:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:16,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:16,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:16,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712040486] [2022-01-18 15:20:16,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712040486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:16,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565891652] [2022-01-18 15:20:16,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:16,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:16,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:16,816 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:16,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-01-18 15:20:17,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:17,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:17,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:17,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:17,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:20:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:17,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:17,392 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:17,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:20:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:17,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565891652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:17,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:17,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 15:20:17,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772193701] [2022-01-18 15:20:17,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:17,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:17,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:17,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:17,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:17,414 INFO L87 Difference]: Start difference. First operand 368 states and 1109 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:18,138 INFO L93 Difference]: Finished difference Result 666 states and 1802 transitions. [2022-01-18 15:20:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:20:18,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:18,138 INFO L225 Difference]: With dead ends: 666 [2022-01-18 15:20:18,139 INFO L226 Difference]: Without dead ends: 530 [2022-01-18 15:20:18,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:20:18,139 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 248 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:18,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 237 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:18,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-18 15:20:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 342. [2022-01-18 15:20:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9912023460410557) internal successors, (1020), 341 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1020 transitions. [2022-01-18 15:20:18,143 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1020 transitions. Word has length 20 [2022-01-18 15:20:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:18,143 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1020 transitions. [2022-01-18 15:20:18,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1020 transitions. [2022-01-18 15:20:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:18,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:18,143 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:18,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-01-18 15:20:18,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-01-18 15:20:18,344 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:18,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:18,344 INFO L85 PathProgramCache]: Analyzing trace with hash 187919682, now seen corresponding path program 333 times [2022-01-18 15:20:18,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:18,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390728603] [2022-01-18 15:20:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:18,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:18,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:18,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390728603] [2022-01-18 15:20:18,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390728603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:18,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168181715] [2022-01-18 15:20:18,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:18,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:18,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:18,430 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:18,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-01-18 15:20:18,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:20:18,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:18,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:18,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:18,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:18,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:18,942 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:18,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:18,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168181715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:18,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:18,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:18,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570190012] [2022-01-18 15:20:18,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:18,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:18,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:18,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:18,947 INFO L87 Difference]: Start difference. First operand 342 states and 1020 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:19,262 INFO L93 Difference]: Finished difference Result 622 states and 1765 transitions. [2022-01-18 15:20:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:19,262 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:19,263 INFO L225 Difference]: With dead ends: 622 [2022-01-18 15:20:19,263 INFO L226 Difference]: Without dead ends: 622 [2022-01-18 15:20:19,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:19,263 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:19,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 254 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:19,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-18 15:20:19,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 344. [2022-01-18 15:20:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.002915451895044) internal successors, (1030), 343 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1030 transitions. [2022-01-18 15:20:19,267 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1030 transitions. Word has length 20 [2022-01-18 15:20:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:19,267 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1030 transitions. [2022-01-18 15:20:19,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1030 transitions. [2022-01-18 15:20:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:19,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:19,268 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:19,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:19,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-01-18 15:20:19,468 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:19,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:19,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1399078142, now seen corresponding path program 334 times [2022-01-18 15:20:19,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:19,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601187878] [2022-01-18 15:20:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:19,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:19,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:19,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601187878] [2022-01-18 15:20:19,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601187878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:19,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096268785] [2022-01-18 15:20:19,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:19,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:19,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:19,556 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:19,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-01-18 15:20:19,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:19,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:19,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:19,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:19,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:20,078 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:20,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:20,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096268785] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:20,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:20,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:20,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371022759] [2022-01-18 15:20:20,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:20,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:20,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:20,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:20,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:20,083 INFO L87 Difference]: Start difference. First operand 344 states and 1030 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:20,380 INFO L93 Difference]: Finished difference Result 589 states and 1683 transitions. [2022-01-18 15:20:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:20,380 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:20,381 INFO L225 Difference]: With dead ends: 589 [2022-01-18 15:20:20,381 INFO L226 Difference]: Without dead ends: 589 [2022-01-18 15:20:20,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:20,381 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 163 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:20,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 220 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-18 15:20:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 351. [2022-01-18 15:20:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.025714285714286) internal successors, (1059), 350 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1059 transitions. [2022-01-18 15:20:20,386 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1059 transitions. Word has length 20 [2022-01-18 15:20:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:20,386 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1059 transitions. [2022-01-18 15:20:20,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:20,386 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1059 transitions. [2022-01-18 15:20:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:20,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:20,386 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:20,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:20,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2022-01-18 15:20:20,587 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:20,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1621734300, now seen corresponding path program 335 times [2022-01-18 15:20:20,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:20,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816981466] [2022-01-18 15:20:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:20,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:20,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:20,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816981466] [2022-01-18 15:20:20,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816981466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:20,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746544641] [2022-01-18 15:20:20,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:20,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:20,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:20,694 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:20,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-01-18 15:20:20,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:20,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:20,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:20,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:21,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:21,223 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:21,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:21,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746544641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:21,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:21,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:21,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118970201] [2022-01-18 15:20:21,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:21,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:21,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:21,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:21,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:21,228 INFO L87 Difference]: Start difference. First operand 351 states and 1059 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:21,510 INFO L93 Difference]: Finished difference Result 556 states and 1606 transitions. [2022-01-18 15:20:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:21,510 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:21,511 INFO L225 Difference]: With dead ends: 556 [2022-01-18 15:20:21,511 INFO L226 Difference]: Without dead ends: 556 [2022-01-18 15:20:21,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:21,511 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 126 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:21,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 216 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-18 15:20:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 342. [2022-01-18 15:20:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9912023460410557) internal successors, (1020), 341 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:21,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1020 transitions. [2022-01-18 15:20:21,515 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1020 transitions. Word has length 20 [2022-01-18 15:20:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:21,515 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1020 transitions. [2022-01-18 15:20:21,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1020 transitions. [2022-01-18 15:20:21,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:21,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:21,516 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:21,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-01-18 15:20:21,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-01-18 15:20:21,716 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:21,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1922133166, now seen corresponding path program 336 times [2022-01-18 15:20:21,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:21,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781881510] [2022-01-18 15:20:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:21,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:21,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:21,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781881510] [2022-01-18 15:20:21,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781881510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:21,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106483813] [2022-01-18 15:20:21,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:21,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:21,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:21,801 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:21,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-01-18 15:20:21,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:20:21,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:21,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:22,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:22,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:22,338 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:22,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:22,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106483813] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:22,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:22,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:22,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962116788] [2022-01-18 15:20:22,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:22,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:22,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:22,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:22,343 INFO L87 Difference]: Start difference. First operand 342 states and 1020 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:22,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:22,674 INFO L93 Difference]: Finished difference Result 671 states and 1859 transitions. [2022-01-18 15:20:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:20:22,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:22,676 INFO L225 Difference]: With dead ends: 671 [2022-01-18 15:20:22,676 INFO L226 Difference]: Without dead ends: 671 [2022-01-18 15:20:22,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:20:22,676 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 254 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:22,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 187 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:22,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-01-18 15:20:22,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 350. [2022-01-18 15:20:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.025787965616046) internal successors, (1056), 349 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1056 transitions. [2022-01-18 15:20:22,681 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1056 transitions. Word has length 20 [2022-01-18 15:20:22,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:22,681 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1056 transitions. [2022-01-18 15:20:22,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1056 transitions. [2022-01-18 15:20:22,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:22,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:22,681 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:22,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-01-18 15:20:22,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:22,882 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:22,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:22,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1490756696, now seen corresponding path program 337 times [2022-01-18 15:20:22,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:22,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639117036] [2022-01-18 15:20:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:22,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:22,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:22,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639117036] [2022-01-18 15:20:22,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639117036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:22,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070087848] [2022-01-18 15:20:22,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:22,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:22,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:22,966 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:22,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-01-18 15:20:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:23,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:23,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:23,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:23,486 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:23,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:23,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070087848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:23,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:23,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:23,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653356948] [2022-01-18 15:20:23,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:23,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:23,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:23,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:23,491 INFO L87 Difference]: Start difference. First operand 350 states and 1056 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:23,769 INFO L93 Difference]: Finished difference Result 605 states and 1705 transitions. [2022-01-18 15:20:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:23,769 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:23,770 INFO L225 Difference]: With dead ends: 605 [2022-01-18 15:20:23,770 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 15:20:23,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:23,770 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 211 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:23,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 204 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:23,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 15:20:23,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 344. [2022-01-18 15:20:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0058309037900877) internal successors, (1031), 343 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1031 transitions. [2022-01-18 15:20:23,775 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1031 transitions. Word has length 20 [2022-01-18 15:20:23,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:23,775 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1031 transitions. [2022-01-18 15:20:23,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:23,775 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1031 transitions. [2022-01-18 15:20:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:23,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:23,775 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:23,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Ended with exit code 0 [2022-01-18 15:20:23,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-01-18 15:20:23,976 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1631936796, now seen corresponding path program 338 times [2022-01-18 15:20:23,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:23,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404665550] [2022-01-18 15:20:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:23,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:24,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:24,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404665550] [2022-01-18 15:20:24,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404665550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:24,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680019481] [2022-01-18 15:20:24,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:24,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:24,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:24,069 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:24,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-01-18 15:20:24,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:24,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:24,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:24,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:24,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:24,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:24,617 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:24,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:24,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680019481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:24,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:24,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:24,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481076290] [2022-01-18 15:20:24,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:24,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:24,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:24,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:24,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:24,622 INFO L87 Difference]: Start difference. First operand 344 states and 1031 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:24,905 INFO L93 Difference]: Finished difference Result 630 states and 1794 transitions. [2022-01-18 15:20:24,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:24,906 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:24,906 INFO L225 Difference]: With dead ends: 630 [2022-01-18 15:20:24,906 INFO L226 Difference]: Without dead ends: 630 [2022-01-18 15:20:24,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:24,907 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 208 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:24,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 207 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:24,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-01-18 15:20:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 347. [2022-01-18 15:20:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.023121387283237) internal successors, (1046), 346 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1046 transitions. [2022-01-18 15:20:24,911 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1046 transitions. Word has length 20 [2022-01-18 15:20:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:24,911 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1046 transitions. [2022-01-18 15:20:24,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1046 transitions. [2022-01-18 15:20:24,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:24,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:24,912 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:24,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-01-18 15:20:25,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:25,112 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:25,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash -637561176, now seen corresponding path program 339 times [2022-01-18 15:20:25,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:25,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677065912] [2022-01-18 15:20:25,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:25,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:25,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:25,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677065912] [2022-01-18 15:20:25,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677065912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:25,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851959246] [2022-01-18 15:20:25,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:25,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:25,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:25,227 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:25,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-01-18 15:20:25,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:20:25,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:25,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:25,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:25,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:25,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:25,761 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:25,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:25,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851959246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:25,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:25,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:25,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621388087] [2022-01-18 15:20:25,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:25,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:25,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:25,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:25,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:25,766 INFO L87 Difference]: Start difference. First operand 347 states and 1046 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:26,078 INFO L93 Difference]: Finished difference Result 599 states and 1727 transitions. [2022-01-18 15:20:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:26,078 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:26,079 INFO L225 Difference]: With dead ends: 599 [2022-01-18 15:20:26,079 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 15:20:26,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:26,079 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 132 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:26,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 231 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 15:20:26,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 344. [2022-01-18 15:20:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0058309037900877) internal successors, (1031), 343 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1031 transitions. [2022-01-18 15:20:26,083 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1031 transitions. Word has length 20 [2022-01-18 15:20:26,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:26,083 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1031 transitions. [2022-01-18 15:20:26,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1031 transitions. [2022-01-18 15:20:26,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:26,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:26,084 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:26,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:26,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:26,285 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:26,286 INFO L85 PathProgramCache]: Analyzing trace with hash 342891956, now seen corresponding path program 340 times [2022-01-18 15:20:26,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:26,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701816836] [2022-01-18 15:20:26,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:26,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:26,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701816836] [2022-01-18 15:20:26,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701816836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673272508] [2022-01-18 15:20:26,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:26,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:26,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:26,371 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:26,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-01-18 15:20:26,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:26,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:26,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:26,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:26,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:26,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:26,867 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:26,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:26,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673272508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:26,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:26,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:26,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521994723] [2022-01-18 15:20:26,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:26,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:26,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:26,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:26,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:26,872 INFO L87 Difference]: Start difference. First operand 344 states and 1031 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:27,102 INFO L93 Difference]: Finished difference Result 553 states and 1574 transitions. [2022-01-18 15:20:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:27,102 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:27,103 INFO L225 Difference]: With dead ends: 553 [2022-01-18 15:20:27,103 INFO L226 Difference]: Without dead ends: 547 [2022-01-18 15:20:27,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:27,103 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 205 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:27,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 153 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-18 15:20:27,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 348. [2022-01-18 15:20:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.011527377521614) internal successors, (1045), 347 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1045 transitions. [2022-01-18 15:20:27,107 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1045 transitions. Word has length 20 [2022-01-18 15:20:27,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:27,107 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1045 transitions. [2022-01-18 15:20:27,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:27,107 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1045 transitions. [2022-01-18 15:20:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:27,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:27,108 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:27,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Ended with exit code 0 [2022-01-18 15:20:27,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:27,308 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash 366791870, now seen corresponding path program 341 times [2022-01-18 15:20:27,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:27,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781689097] [2022-01-18 15:20:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:27,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:27,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:27,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781689097] [2022-01-18 15:20:27,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781689097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:27,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585013870] [2022-01-18 15:20:27,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:27,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:27,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:27,402 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:27,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-01-18 15:20:27,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:20:27,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:27,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:20:27,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:27,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 111 [2022-01-18 15:20:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:27,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:28,125 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:28,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 7 [2022-01-18 15:20:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:28,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585013870] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:28,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:28,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:20:28,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431705913] [2022-01-18 15:20:28,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:28,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:28,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:28,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:28,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:28,133 INFO L87 Difference]: Start difference. First operand 348 states and 1045 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:28,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:28,666 INFO L93 Difference]: Finished difference Result 569 states and 1629 transitions. [2022-01-18 15:20:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:20:28,666 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:28,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:28,667 INFO L225 Difference]: With dead ends: 569 [2022-01-18 15:20:28,667 INFO L226 Difference]: Without dead ends: 548 [2022-01-18 15:20:28,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:20:28,667 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 164 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:28,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 218 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-18 15:20:28,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 343. [2022-01-18 15:20:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.002923976608187) internal successors, (1027), 342 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:28,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1027 transitions. [2022-01-18 15:20:28,671 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1027 transitions. Word has length 20 [2022-01-18 15:20:28,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:28,672 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1027 transitions. [2022-01-18 15:20:28,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1027 transitions. [2022-01-18 15:20:28,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:28,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:28,672 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:28,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Ended with exit code 0 [2022-01-18 15:20:28,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-01-18 15:20:28,872 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:28,873 INFO L85 PathProgramCache]: Analyzing trace with hash -448547172, now seen corresponding path program 342 times [2022-01-18 15:20:28,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:28,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362334231] [2022-01-18 15:20:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:28,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:28,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:28,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362334231] [2022-01-18 15:20:28,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362334231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:28,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765049319] [2022-01-18 15:20:28,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:28,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:28,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:28,948 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:28,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-01-18 15:20:29,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:20:29,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:29,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:29,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:29,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:20:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:29,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:29,402 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:29,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:29,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765049319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:29,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:29,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:29,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407230339] [2022-01-18 15:20:29,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:29,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:29,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:29,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:29,407 INFO L87 Difference]: Start difference. First operand 343 states and 1027 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:29,654 INFO L93 Difference]: Finished difference Result 521 states and 1545 transitions. [2022-01-18 15:20:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:29,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:29,655 INFO L225 Difference]: With dead ends: 521 [2022-01-18 15:20:29,655 INFO L226 Difference]: Without dead ends: 521 [2022-01-18 15:20:29,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:29,655 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:29,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 194 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-01-18 15:20:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 347. [2022-01-18 15:20:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.020231213872832) internal successors, (1045), 346 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1045 transitions. [2022-01-18 15:20:29,659 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1045 transitions. Word has length 20 [2022-01-18 15:20:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:29,659 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1045 transitions. [2022-01-18 15:20:29,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1045 transitions. [2022-01-18 15:20:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:29,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:29,660 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:29,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-01-18 15:20:29,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-01-18 15:20:29,863 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:29,863 INFO L85 PathProgramCache]: Analyzing trace with hash 762611288, now seen corresponding path program 343 times [2022-01-18 15:20:29,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:29,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706068648] [2022-01-18 15:20:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:29,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:29,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706068648] [2022-01-18 15:20:29,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706068648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062566485] [2022-01-18 15:20:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:29,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:29,940 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:29,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-01-18 15:20:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:30,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:30,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:30,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:20:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:30,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:30,434 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:30,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:30,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062566485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:30,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:30,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:30,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811574728] [2022-01-18 15:20:30,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:30,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:30,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:30,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:30,439 INFO L87 Difference]: Start difference. First operand 347 states and 1045 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:30,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:30,708 INFO L93 Difference]: Finished difference Result 515 states and 1505 transitions. [2022-01-18 15:20:30,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:30,709 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:30,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:30,709 INFO L225 Difference]: With dead ends: 515 [2022-01-18 15:20:30,709 INFO L226 Difference]: Without dead ends: 515 [2022-01-18 15:20:30,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:30,710 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 152 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:30,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 213 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-18 15:20:30,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 358. [2022-01-18 15:20:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0364145658263304) internal successors, (1084), 357 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:30,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1084 transitions. [2022-01-18 15:20:30,714 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1084 transitions. Word has length 20 [2022-01-18 15:20:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:30,714 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1084 transitions. [2022-01-18 15:20:30,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1084 transitions. [2022-01-18 15:20:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:30,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:30,714 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:30,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-01-18 15:20:30,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-01-18 15:20:30,915 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2036766142, now seen corresponding path program 344 times [2022-01-18 15:20:30,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:30,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470089527] [2022-01-18 15:20:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:30,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:30,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:30,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470089527] [2022-01-18 15:20:30,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470089527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:30,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942924991] [2022-01-18 15:20:30,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:30,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:30,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:30,993 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:30,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-01-18 15:20:31,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:31,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:31,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:31,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:20:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:31,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:31,478 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:31,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:31,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942924991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:31,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:31,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:31,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871832928] [2022-01-18 15:20:31,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:31,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:31,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:31,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:31,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:31,482 INFO L87 Difference]: Start difference. First operand 358 states and 1084 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:31,709 INFO L93 Difference]: Finished difference Result 472 states and 1408 transitions. [2022-01-18 15:20:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:31,709 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:31,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:31,709 INFO L225 Difference]: With dead ends: 472 [2022-01-18 15:20:31,710 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 15:20:31,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:31,710 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 122 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:31,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 162 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 15:20:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 349. [2022-01-18 15:20:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.0028735632183907) internal successors, (1045), 348 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:31,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1045 transitions. [2022-01-18 15:20:31,714 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1045 transitions. Word has length 20 [2022-01-18 15:20:31,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:31,714 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1045 transitions. [2022-01-18 15:20:31,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1045 transitions. [2022-01-18 15:20:31,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:31,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:31,714 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:31,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:31,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-01-18 15:20:31,914 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:31,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:31,915 INFO L85 PathProgramCache]: Analyzing trace with hash -899788350, now seen corresponding path program 345 times [2022-01-18 15:20:31,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:31,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262841520] [2022-01-18 15:20:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:31,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:31,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:31,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262841520] [2022-01-18 15:20:31,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262841520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:31,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296006953] [2022-01-18 15:20:31,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:31,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:31,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:31,991 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:31,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-01-18 15:20:32,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:20:32,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:32,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:32,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:32,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:20:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:32,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:32,524 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:32,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:32,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296006953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:32,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:32,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:32,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43620892] [2022-01-18 15:20:32,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:32,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:32,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:32,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:32,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:32,529 INFO L87 Difference]: Start difference. First operand 349 states and 1045 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:32,834 INFO L93 Difference]: Finished difference Result 425 states and 1250 transitions. [2022-01-18 15:20:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:32,834 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:32,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:32,835 INFO L225 Difference]: With dead ends: 425 [2022-01-18 15:20:32,835 INFO L226 Difference]: Without dead ends: 425 [2022-01-18 15:20:32,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:32,835 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 115 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:32,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 253 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:32,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-01-18 15:20:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 355. [2022-01-18 15:20:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0282485875706215) internal successors, (1072), 354 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1072 transitions. [2022-01-18 15:20:32,839 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1072 transitions. Word has length 20 [2022-01-18 15:20:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:32,839 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1072 transitions. [2022-01-18 15:20:32,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1072 transitions. [2022-01-18 15:20:32,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:32,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:32,839 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:32,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:33,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:33,040 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash 374366504, now seen corresponding path program 346 times [2022-01-18 15:20:33,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:33,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20425034] [2022-01-18 15:20:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:33,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:33,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:33,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20425034] [2022-01-18 15:20:33,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20425034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:33,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924814199] [2022-01-18 15:20:33,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:33,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:33,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:33,117 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:33,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-01-18 15:20:33,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:33,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:33,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:33,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:33,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:20:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:33,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:33,642 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:33,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:33,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924814199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:33,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:33,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:33,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676204263] [2022-01-18 15:20:33,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:33,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:33,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:33,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:33,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:33,647 INFO L87 Difference]: Start difference. First operand 355 states and 1072 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:33,981 INFO L93 Difference]: Finished difference Result 431 states and 1265 transitions. [2022-01-18 15:20:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:20:33,981 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:33,982 INFO L225 Difference]: With dead ends: 431 [2022-01-18 15:20:33,982 INFO L226 Difference]: Without dead ends: 431 [2022-01-18 15:20:33,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:33,982 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 110 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:33,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 241 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-18 15:20:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 352. [2022-01-18 15:20:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.011396011396011) internal successors, (1057), 351 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1057 transitions. [2022-01-18 15:20:33,986 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1057 transitions. Word has length 20 [2022-01-18 15:20:33,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:33,986 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 1057 transitions. [2022-01-18 15:20:33,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1057 transitions. [2022-01-18 15:20:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:33,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:33,986 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:34,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-01-18 15:20:34,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2022-01-18 15:20:34,187 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:34,187 INFO L85 PathProgramCache]: Analyzing trace with hash 376992280, now seen corresponding path program 347 times [2022-01-18 15:20:34,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:34,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396438184] [2022-01-18 15:20:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:34,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:34,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:34,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396438184] [2022-01-18 15:20:34,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396438184] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:34,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600626350] [2022-01-18 15:20:34,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:34,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:34,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:34,253 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:34,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-01-18 15:20:34,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:34,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:34,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:34,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:34,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:34,736 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:34,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:34,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600626350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:34,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:34,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:34,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556521234] [2022-01-18 15:20:34,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:34,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:34,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:34,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:34,741 INFO L87 Difference]: Start difference. First operand 352 states and 1057 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:34,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:34,974 INFO L93 Difference]: Finished difference Result 389 states and 1158 transitions. [2022-01-18 15:20:34,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:34,975 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:34,975 INFO L225 Difference]: With dead ends: 389 [2022-01-18 15:20:34,975 INFO L226 Difference]: Without dead ends: 389 [2022-01-18 15:20:34,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:34,975 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:34,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 187 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-18 15:20:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 343. [2022-01-18 15:20:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.002923976608187) internal successors, (1027), 342 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1027 transitions. [2022-01-18 15:20:34,979 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1027 transitions. Word has length 20 [2022-01-18 15:20:34,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:34,979 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1027 transitions. [2022-01-18 15:20:34,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:34,979 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1027 transitions. [2022-01-18 15:20:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:34,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:34,979 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:34,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Ended with exit code 0 [2022-01-18 15:20:35,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2022-01-18 15:20:35,180 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:35,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:35,180 INFO L85 PathProgramCache]: Analyzing trace with hash 649199458, now seen corresponding path program 348 times [2022-01-18 15:20:35,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:35,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955561340] [2022-01-18 15:20:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:35,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:35,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:35,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955561340] [2022-01-18 15:20:35,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955561340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:35,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757164530] [2022-01-18 15:20:35,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:35,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:35,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:35,271 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:35,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-01-18 15:20:35,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:20:35,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:35,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:35,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:35,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:20:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:35,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:35,832 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:35,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:35,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757164530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:35,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:35,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:35,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939619824] [2022-01-18 15:20:35,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:35,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:35,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:35,837 INFO L87 Difference]: Start difference. First operand 343 states and 1027 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:36,201 INFO L93 Difference]: Finished difference Result 558 states and 1575 transitions. [2022-01-18 15:20:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:20:36,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:36,202 INFO L225 Difference]: With dead ends: 558 [2022-01-18 15:20:36,202 INFO L226 Difference]: Without dead ends: 558 [2022-01-18 15:20:36,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:20:36,202 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 189 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:36,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 238 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:36,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-18 15:20:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 353. [2022-01-18 15:20:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.0454545454545454) internal successors, (1072), 352 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:36,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1072 transitions. [2022-01-18 15:20:36,206 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1072 transitions. Word has length 20 [2022-01-18 15:20:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:36,207 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1072 transitions. [2022-01-18 15:20:36,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1072 transitions. [2022-01-18 15:20:36,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:36,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:36,207 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:36,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-01-18 15:20:36,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2022-01-18 15:20:36,407 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:36,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:36,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1531276892, now seen corresponding path program 349 times [2022-01-18 15:20:36,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:36,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713289603] [2022-01-18 15:20:36,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:36,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:36,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:36,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713289603] [2022-01-18 15:20:36,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713289603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:36,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4420736] [2022-01-18 15:20:36,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:36,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:36,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:36,496 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:36,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-01-18 15:20:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:36,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:36,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:36,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:20:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:36,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:37,045 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:37,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:37,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4420736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:37,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:37,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:37,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341283364] [2022-01-18 15:20:37,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:37,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:37,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:37,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:37,050 INFO L87 Difference]: Start difference. First operand 353 states and 1072 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:37,304 INFO L93 Difference]: Finished difference Result 492 states and 1421 transitions. [2022-01-18 15:20:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:37,304 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:37,305 INFO L225 Difference]: With dead ends: 492 [2022-01-18 15:20:37,305 INFO L226 Difference]: Without dead ends: 486 [2022-01-18 15:20:37,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:37,305 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 164 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:37,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 179 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-01-18 15:20:37,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 347. [2022-01-18 15:20:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0260115606936417) internal successors, (1047), 346 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1047 transitions. [2022-01-18 15:20:37,309 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1047 transitions. Word has length 20 [2022-01-18 15:20:37,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:37,309 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1047 transitions. [2022-01-18 15:20:37,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1047 transitions. [2022-01-18 15:20:37,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:37,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:37,309 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:37,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-01-18 15:20:37,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:37,510 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:37,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1390096792, now seen corresponding path program 350 times [2022-01-18 15:20:37,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:37,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474793075] [2022-01-18 15:20:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:37,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:37,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:37,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474793075] [2022-01-18 15:20:37,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474793075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:37,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389718752] [2022-01-18 15:20:37,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:37,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:37,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:37,602 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:37,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-01-18 15:20:37,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:37,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:37,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:37,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:37,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:20:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:37,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:38,170 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:38,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:38,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389718752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:38,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:38,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:38,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522105040] [2022-01-18 15:20:38,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:38,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:38,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:38,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:38,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:38,175 INFO L87 Difference]: Start difference. First operand 347 states and 1047 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:38,571 INFO L93 Difference]: Finished difference Result 563 states and 1619 transitions. [2022-01-18 15:20:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:20:38,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:38,572 INFO L225 Difference]: With dead ends: 563 [2022-01-18 15:20:38,572 INFO L226 Difference]: Without dead ends: 563 [2022-01-18 15:20:38,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:20:38,572 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 127 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:38,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 257 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-18 15:20:38,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 350. [2022-01-18 15:20:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.04297994269341) internal successors, (1062), 349 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1062 transitions. [2022-01-18 15:20:38,577 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1062 transitions. Word has length 20 [2022-01-18 15:20:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:38,577 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1062 transitions. [2022-01-18 15:20:38,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1062 transitions. [2022-01-18 15:20:38,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:38,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:38,577 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:38,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Ended with exit code 0 [2022-01-18 15:20:38,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:38,778 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1910494884, now seen corresponding path program 351 times [2022-01-18 15:20:38,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:38,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029132023] [2022-01-18 15:20:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:38,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:38,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:38,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029132023] [2022-01-18 15:20:38,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029132023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:38,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756216615] [2022-01-18 15:20:38,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:38,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:38,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:38,869 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:38,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-01-18 15:20:39,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:20:39,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:39,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:39,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:20:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:39,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:39,419 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:39,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:39,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756216615] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:39,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:39,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:39,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551223599] [2022-01-18 15:20:39,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:39,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:39,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:39,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:39,424 INFO L87 Difference]: Start difference. First operand 350 states and 1062 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:39,803 INFO L93 Difference]: Finished difference Result 532 states and 1552 transitions. [2022-01-18 15:20:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:20:39,804 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:39,804 INFO L225 Difference]: With dead ends: 532 [2022-01-18 15:20:39,804 INFO L226 Difference]: Without dead ends: 532 [2022-01-18 15:20:39,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:20:39,805 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 124 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:39,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 242 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:39,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-18 15:20:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 347. [2022-01-18 15:20:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0260115606936417) internal successors, (1047), 346 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1047 transitions. [2022-01-18 15:20:39,809 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1047 transitions. Word has length 20 [2022-01-18 15:20:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:39,809 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1047 transitions. [2022-01-18 15:20:39,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1047 transitions. [2022-01-18 15:20:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:39,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:39,810 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:39,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:40,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:40,010 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:40,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:40,010 INFO L85 PathProgramCache]: Analyzing trace with hash -930041752, now seen corresponding path program 352 times [2022-01-18 15:20:40,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:40,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441703348] [2022-01-18 15:20:40,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:40,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:40,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:40,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441703348] [2022-01-18 15:20:40,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441703348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:40,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526431216] [2022-01-18 15:20:40,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:40,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:40,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:40,095 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:40,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-01-18 15:20:40,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:40,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:40,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:40,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:40,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:20:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:40,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:40,628 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:40,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:40,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526431216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:40,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:40,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:40,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722173489] [2022-01-18 15:20:40,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:40,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:40,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:40,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:40,633 INFO L87 Difference]: Start difference. First operand 347 states and 1047 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:41,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:41,027 INFO L93 Difference]: Finished difference Result 529 states and 1500 transitions. [2022-01-18 15:20:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:20:41,027 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:41,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:41,028 INFO L225 Difference]: With dead ends: 529 [2022-01-18 15:20:41,028 INFO L226 Difference]: Without dead ends: 523 [2022-01-18 15:20:41,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:20:41,028 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 142 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:41,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 253 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-18 15:20:41,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 351. [2022-01-18 15:20:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0314285714285716) internal successors, (1061), 350 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1061 transitions. [2022-01-18 15:20:41,032 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1061 transitions. Word has length 20 [2022-01-18 15:20:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:41,032 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1061 transitions. [2022-01-18 15:20:41,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:41,033 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1061 transitions. [2022-01-18 15:20:41,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:41,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:41,033 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:41,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Ended with exit code 0 [2022-01-18 15:20:41,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-01-18 15:20:41,233 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:41,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:41,234 INFO L85 PathProgramCache]: Analyzing trace with hash -906141838, now seen corresponding path program 353 times [2022-01-18 15:20:41,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:41,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426080535] [2022-01-18 15:20:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:41,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:41,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:41,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426080535] [2022-01-18 15:20:41,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426080535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:41,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765845579] [2022-01-18 15:20:41,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:41,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:41,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:41,330 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:41,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-01-18 15:20:41,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:20:41,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:41,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:41,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:41,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:20:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:41,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:41,872 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:41,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:41,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765845579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:41,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:41,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:41,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847970979] [2022-01-18 15:20:41,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:41,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:41,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:41,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:41,877 INFO L87 Difference]: Start difference. First operand 351 states and 1061 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:42,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:42,323 INFO L93 Difference]: Finished difference Result 535 states and 1521 transitions. [2022-01-18 15:20:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:20:42,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:42,324 INFO L225 Difference]: With dead ends: 535 [2022-01-18 15:20:42,324 INFO L226 Difference]: Without dead ends: 535 [2022-01-18 15:20:42,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:20:42,324 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 111 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:42,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 308 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-18 15:20:42,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 345. [2022-01-18 15:20:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.011627906976744) internal successors, (1036), 344 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1036 transitions. [2022-01-18 15:20:42,328 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1036 transitions. Word has length 20 [2022-01-18 15:20:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:42,328 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1036 transitions. [2022-01-18 15:20:42,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:42,329 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1036 transitions. [2022-01-18 15:20:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:42,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:42,329 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:42,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Ended with exit code 0 [2022-01-18 15:20:42,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-01-18 15:20:42,529 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:42,530 INFO L85 PathProgramCache]: Analyzing trace with hash 122639614, now seen corresponding path program 354 times [2022-01-18 15:20:42,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:42,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107680732] [2022-01-18 15:20:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:42,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:42,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:42,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107680732] [2022-01-18 15:20:42,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107680732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:42,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862955929] [2022-01-18 15:20:42,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:42,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:42,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:42,615 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:42,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-01-18 15:20:42,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:20:42,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:42,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:42,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:42,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:20:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:43,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:43,175 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:43,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:43,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862955929] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:43,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:43,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:43,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156500083] [2022-01-18 15:20:43,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:43,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:43,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:43,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:43,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:43,180 INFO L87 Difference]: Start difference. First operand 345 states and 1036 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:43,482 INFO L93 Difference]: Finished difference Result 475 states and 1398 transitions. [2022-01-18 15:20:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:43,483 INFO L225 Difference]: With dead ends: 475 [2022-01-18 15:20:43,483 INFO L226 Difference]: Without dead ends: 475 [2022-01-18 15:20:43,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:43,483 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 105 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:43,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 211 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-18 15:20:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 351. [2022-01-18 15:20:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.037142857142857) internal successors, (1063), 350 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1063 transitions. [2022-01-18 15:20:43,487 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1063 transitions. Word has length 20 [2022-01-18 15:20:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:43,487 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1063 transitions. [2022-01-18 15:20:43,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1063 transitions. [2022-01-18 15:20:43,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:43,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:43,487 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:43,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Ended with exit code 0 [2022-01-18 15:20:43,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-01-18 15:20:43,688 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1117015234, now seen corresponding path program 355 times [2022-01-18 15:20:43,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:43,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135829135] [2022-01-18 15:20:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:43,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:43,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:43,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135829135] [2022-01-18 15:20:43,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135829135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:43,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235761228] [2022-01-18 15:20:43,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:43,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:43,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:43,773 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:43,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-01-18 15:20:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:43,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:43,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:44,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:20:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:44,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:44,317 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:44,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:44,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235761228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:44,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:44,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:44,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066612117] [2022-01-18 15:20:44,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:44,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:44,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:44,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:44,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:44,322 INFO L87 Difference]: Start difference. First operand 351 states and 1063 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:44,659 INFO L93 Difference]: Finished difference Result 469 states and 1380 transitions. [2022-01-18 15:20:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:20:44,659 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:44,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:44,660 INFO L225 Difference]: With dead ends: 469 [2022-01-18 15:20:44,660 INFO L226 Difference]: Without dead ends: 469 [2022-01-18 15:20:44,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:20:44,660 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 107 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:44,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 227 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-18 15:20:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 348. [2022-01-18 15:20:44,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.0201729106628243) internal successors, (1048), 347 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1048 transitions. [2022-01-18 15:20:44,664 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1048 transitions. Word has length 20 [2022-01-18 15:20:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:44,664 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1048 transitions. [2022-01-18 15:20:44,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1048 transitions. [2022-01-18 15:20:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:44,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:44,665 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:44,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:44,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-01-18 15:20:44,865 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:44,865 INFO L85 PathProgramCache]: Analyzing trace with hash 821588052, now seen corresponding path program 356 times [2022-01-18 15:20:44,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:44,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821655081] [2022-01-18 15:20:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:44,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:44,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:44,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821655081] [2022-01-18 15:20:44,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821655081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:44,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97504457] [2022-01-18 15:20:44,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:44,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:44,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:44,940 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:44,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-01-18 15:20:45,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:45,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:45,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:45,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:45,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:45,471 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:45,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:45,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97504457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:45,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:45,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:45,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058097602] [2022-01-18 15:20:45,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:45,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:45,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:45,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:45,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:45,476 INFO L87 Difference]: Start difference. First operand 348 states and 1048 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:45,789 INFO L93 Difference]: Finished difference Result 430 states and 1273 transitions. [2022-01-18 15:20:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:45,790 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:45,790 INFO L225 Difference]: With dead ends: 430 [2022-01-18 15:20:45,790 INFO L226 Difference]: Without dead ends: 430 [2022-01-18 15:20:45,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:45,791 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:45,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 224 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-01-18 15:20:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 345. [2022-01-18 15:20:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.011627906976744) internal successors, (1036), 344 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1036 transitions. [2022-01-18 15:20:45,794 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1036 transitions. Word has length 20 [2022-01-18 15:20:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:45,794 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1036 transitions. [2022-01-18 15:20:45,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1036 transitions. [2022-01-18 15:20:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:45,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:45,795 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:45,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:45,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2022-01-18 15:20:45,995 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:45,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:45,995 INFO L85 PathProgramCache]: Analyzing trace with hash -14960264, now seen corresponding path program 357 times [2022-01-18 15:20:45,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:45,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025258332] [2022-01-18 15:20:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:45,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:46,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:46,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025258332] [2022-01-18 15:20:46,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025258332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:46,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246981730] [2022-01-18 15:20:46,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:46,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:46,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:46,070 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:46,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-01-18 15:20:46,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:20:46,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:46,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:46,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:46,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:46,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:46,590 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:46,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:46,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246981730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:46,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:46,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:46,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584678587] [2022-01-18 15:20:46,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:46,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:46,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:46,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:46,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:46,595 INFO L87 Difference]: Start difference. First operand 345 states and 1036 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:46,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:46,854 INFO L93 Difference]: Finished difference Result 431 states and 1248 transitions. [2022-01-18 15:20:46,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:46,854 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:46,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:46,855 INFO L225 Difference]: With dead ends: 431 [2022-01-18 15:20:46,855 INFO L226 Difference]: Without dead ends: 425 [2022-01-18 15:20:46,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:46,855 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:46,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 192 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-01-18 15:20:46,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 353. [2022-01-18 15:20:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.0170454545454546) internal successors, (1062), 352 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1062 transitions. [2022-01-18 15:20:46,859 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1062 transitions. Word has length 20 [2022-01-18 15:20:46,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:46,859 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1062 transitions. [2022-01-18 15:20:46,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1062 transitions. [2022-01-18 15:20:46,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:46,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:46,859 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:46,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-01-18 15:20:47,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:47,060 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:47,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:47,060 INFO L85 PathProgramCache]: Analyzing trace with hash 8939650, now seen corresponding path program 358 times [2022-01-18 15:20:47,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:47,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445740137] [2022-01-18 15:20:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:47,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:47,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:47,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445740137] [2022-01-18 15:20:47,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445740137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:47,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889981369] [2022-01-18 15:20:47,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:47,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:47,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:47,144 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:47,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-01-18 15:20:47,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:47,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:47,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:47,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:47,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:47,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:47,680 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:47,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:47,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889981369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:47,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:47,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:47,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712984717] [2022-01-18 15:20:47,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:47,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:47,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:47,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:47,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:47,685 INFO L87 Difference]: Start difference. First operand 353 states and 1062 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:47,991 INFO L93 Difference]: Finished difference Result 437 states and 1269 transitions. [2022-01-18 15:20:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:20:47,991 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:47,992 INFO L225 Difference]: With dead ends: 437 [2022-01-18 15:20:47,992 INFO L226 Difference]: Without dead ends: 437 [2022-01-18 15:20:47,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:20:47,992 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 122 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:47,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 214 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-01-18 15:20:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 349. [2022-01-18 15:20:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.0114942528735633) internal successors, (1048), 348 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1048 transitions. [2022-01-18 15:20:47,996 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1048 transitions. Word has length 20 [2022-01-18 15:20:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:47,996 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1048 transitions. [2022-01-18 15:20:47,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:47,996 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1048 transitions. [2022-01-18 15:20:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:47,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:47,997 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:48,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Ended with exit code 0 [2022-01-18 15:20:48,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:48,197 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:48,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1492074588, now seen corresponding path program 359 times [2022-01-18 15:20:48,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:48,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907167815] [2022-01-18 15:20:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:48,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:48,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:48,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907167815] [2022-01-18 15:20:48,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907167815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:48,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524901866] [2022-01-18 15:20:48,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:48,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:48,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:48,281 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:48,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-01-18 15:20:48,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:20:48,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:48,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:48,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:48,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:48,732 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:48,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:48,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524901866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:48,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:48,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:20:48,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995676603] [2022-01-18 15:20:48,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:48,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:20:48,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:48,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:20:48,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:20:48,743 INFO L87 Difference]: Start difference. First operand 349 states and 1048 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:48,957 INFO L93 Difference]: Finished difference Result 412 states and 1219 transitions. [2022-01-18 15:20:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:48,958 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:48,958 INFO L225 Difference]: With dead ends: 412 [2022-01-18 15:20:48,958 INFO L226 Difference]: Without dead ends: 412 [2022-01-18 15:20:48,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:48,959 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:48,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 122 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:20:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-18 15:20:48,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 344. [2022-01-18 15:20:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.011661807580175) internal successors, (1033), 343 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1033 transitions. [2022-01-18 15:20:48,962 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1033 transitions. Word has length 20 [2022-01-18 15:20:48,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:48,962 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1033 transitions. [2022-01-18 15:20:48,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1033 transitions. [2022-01-18 15:20:48,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:48,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:48,963 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:48,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:49,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:49,179 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:49,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:49,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1027070406, now seen corresponding path program 360 times [2022-01-18 15:20:49,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:49,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130401546] [2022-01-18 15:20:49,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:49,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:49,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:49,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130401546] [2022-01-18 15:20:49,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130401546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:49,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500406506] [2022-01-18 15:20:49,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:49,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:49,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:49,252 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:49,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-01-18 15:20:49,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:20:49,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:49,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:49,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:49,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:20:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:49,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:49,667 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:49,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:49,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500406506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:49,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:49,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:20:49,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778353691] [2022-01-18 15:20:49,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:49,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:49,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:49,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:49,672 INFO L87 Difference]: Start difference. First operand 344 states and 1033 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:49,929 INFO L93 Difference]: Finished difference Result 563 states and 1613 transitions. [2022-01-18 15:20:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:49,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:49,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:49,930 INFO L225 Difference]: With dead ends: 563 [2022-01-18 15:20:49,930 INFO L226 Difference]: Without dead ends: 563 [2022-01-18 15:20:49,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:49,930 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 132 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:49,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 220 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-18 15:20:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 327. [2022-01-18 15:20:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.003067484662577) internal successors, (979), 326 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 979 transitions. [2022-01-18 15:20:49,934 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 979 transitions. Word has length 20 [2022-01-18 15:20:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:49,934 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 979 transitions. [2022-01-18 15:20:49,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 979 transitions. [2022-01-18 15:20:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:49,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:49,934 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:49,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Ended with exit code 0 [2022-01-18 15:20:50,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:50,135 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:50,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:50,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2056738430, now seen corresponding path program 361 times [2022-01-18 15:20:50,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:50,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704826424] [2022-01-18 15:20:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:50,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:50,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:50,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704826424] [2022-01-18 15:20:50,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704826424] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:50,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636186196] [2022-01-18 15:20:50,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:50,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:50,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:50,207 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:50,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-01-18 15:20:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:50,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:50,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:50,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:20:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:50,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:50,686 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:50,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:50,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636186196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:50,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:50,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:50,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668272035] [2022-01-18 15:20:50,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:50,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:50,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:50,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:50,691 INFO L87 Difference]: Start difference. First operand 327 states and 979 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:50,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:50,931 INFO L93 Difference]: Finished difference Result 582 states and 1653 transitions. [2022-01-18 15:20:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:50,932 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:50,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:50,932 INFO L225 Difference]: With dead ends: 582 [2022-01-18 15:20:50,932 INFO L226 Difference]: Without dead ends: 582 [2022-01-18 15:20:50,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:50,933 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 209 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:50,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 193 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-18 15:20:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 334. [2022-01-18 15:20:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.027027027027027) internal successors, (1008), 333 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1008 transitions. [2022-01-18 15:20:50,937 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1008 transitions. Word has length 20 [2022-01-18 15:20:50,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:50,937 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1008 transitions. [2022-01-18 15:20:50,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:50,937 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1008 transitions. [2022-01-18 15:20:50,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:50,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:50,937 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:50,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Ended with exit code 0 [2022-01-18 15:20:51,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:51,138 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:51,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:51,138 INFO L85 PathProgramCache]: Analyzing trace with hash -782583576, now seen corresponding path program 362 times [2022-01-18 15:20:51,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:51,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995038463] [2022-01-18 15:20:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:51,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:51,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:51,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995038463] [2022-01-18 15:20:51,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995038463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:51,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360825695] [2022-01-18 15:20:51,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:51,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:51,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:51,244 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:51,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-01-18 15:20:51,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:51,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:51,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:51,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:51,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-18 15:20:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:51,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:51,720 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:51,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:51,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360825695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:51,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:51,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:51,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88207221] [2022-01-18 15:20:51,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:51,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:51,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:51,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:51,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:51,725 INFO L87 Difference]: Start difference. First operand 334 states and 1008 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:51,953 INFO L93 Difference]: Finished difference Result 539 states and 1556 transitions. [2022-01-18 15:20:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:51,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:51,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:51,954 INFO L225 Difference]: With dead ends: 539 [2022-01-18 15:20:51,954 INFO L226 Difference]: Without dead ends: 539 [2022-01-18 15:20:51,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:51,954 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 158 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:51,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 178 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-18 15:20:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 325. [2022-01-18 15:20:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.990740740740741) internal successors, (969), 324 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 969 transitions. [2022-01-18 15:20:51,958 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 969 transitions. Word has length 20 [2022-01-18 15:20:51,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:51,958 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 969 transitions. [2022-01-18 15:20:51,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:51,958 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 969 transitions. [2022-01-18 15:20:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:51,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:51,959 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:51,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Ended with exit code 0 [2022-01-18 15:20:52,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:52,159 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:52,159 INFO L85 PathProgramCache]: Analyzing trace with hash 575829228, now seen corresponding path program 363 times [2022-01-18 15:20:52,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:52,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482962952] [2022-01-18 15:20:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:52,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:52,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:52,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482962952] [2022-01-18 15:20:52,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482962952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:52,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644681110] [2022-01-18 15:20:52,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:52,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:52,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:52,251 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:52,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-01-18 15:20:52,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:20:52,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:52,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:52,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:52,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:20:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:52,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:52,761 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:52,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:52,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644681110] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:52,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:52,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:20:52,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515968444] [2022-01-18 15:20:52,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:52,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:52,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:52,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:52,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:52,766 INFO L87 Difference]: Start difference. First operand 325 states and 969 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:53,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:53,080 INFO L93 Difference]: Finished difference Result 477 states and 1338 transitions. [2022-01-18 15:20:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:53,081 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:53,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:53,081 INFO L225 Difference]: With dead ends: 477 [2022-01-18 15:20:53,081 INFO L226 Difference]: Without dead ends: 477 [2022-01-18 15:20:53,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:20:53,081 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 185 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:53,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 210 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-18 15:20:53,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 326. [2022-01-18 15:20:53,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9876923076923076) internal successors, (971), 325 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 971 transitions. [2022-01-18 15:20:53,085 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 971 transitions. Word has length 20 [2022-01-18 15:20:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:53,085 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 971 transitions. [2022-01-18 15:20:53,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 971 transitions. [2022-01-18 15:20:53,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:53,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:53,086 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:53,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Ended with exit code 0 [2022-01-18 15:20:53,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:53,286 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:53,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1849984082, now seen corresponding path program 364 times [2022-01-18 15:20:53,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:53,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176247975] [2022-01-18 15:20:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:53,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:53,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:53,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176247975] [2022-01-18 15:20:53,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176247975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:53,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972638538] [2022-01-18 15:20:53,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:53,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:53,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:53,358 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:53,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-01-18 15:20:53,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:53,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:53,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:53,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:53,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:20:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:53,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:53,845 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:53,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:53,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972638538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:53,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:53,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:53,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647896508] [2022-01-18 15:20:53,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:53,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:53,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:53,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:53,850 INFO L87 Difference]: Start difference. First operand 326 states and 971 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:54,109 INFO L93 Difference]: Finished difference Result 479 states and 1342 transitions. [2022-01-18 15:20:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:20:54,109 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:54,110 INFO L225 Difference]: With dead ends: 479 [2022-01-18 15:20:54,110 INFO L226 Difference]: Without dead ends: 479 [2022-01-18 15:20:54,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:54,110 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 178 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:54,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 193 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-18 15:20:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 323. [2022-01-18 15:20:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.968944099378882) internal successors, (956), 322 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 956 transitions. [2022-01-18 15:20:54,114 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 956 transitions. Word has length 20 [2022-01-18 15:20:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:54,114 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 956 transitions. [2022-01-18 15:20:54,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 956 transitions. [2022-01-18 15:20:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:54,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:54,114 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:54,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:54,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-01-18 15:20:54,315 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1852609858, now seen corresponding path program 365 times [2022-01-18 15:20:54,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:54,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360253469] [2022-01-18 15:20:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:54,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:54,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:54,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360253469] [2022-01-18 15:20:54,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360253469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:54,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945098104] [2022-01-18 15:20:54,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:54,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:54,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:54,379 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:54,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-01-18 15:20:54,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:54,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:54,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:54,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:54,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:54,851 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:54,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:54,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945098104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:54,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:54,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:54,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652655855] [2022-01-18 15:20:54,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:54,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:54,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:54,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:54,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:54,856 INFO L87 Difference]: Start difference. First operand 323 states and 956 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:55,116 INFO L93 Difference]: Finished difference Result 428 states and 1211 transitions. [2022-01-18 15:20:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:55,117 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:55,117 INFO L225 Difference]: With dead ends: 428 [2022-01-18 15:20:55,117 INFO L226 Difference]: Without dead ends: 428 [2022-01-18 15:20:55,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:55,117 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 119 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:55,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 215 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:55,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-18 15:20:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 304. [2022-01-18 15:20:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9603960396039604) internal successors, (897), 303 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 897 transitions. [2022-01-18 15:20:55,121 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 897 transitions. Word has length 20 [2022-01-18 15:20:55,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:55,121 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 897 transitions. [2022-01-18 15:20:55,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:55,121 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 897 transitions. [2022-01-18 15:20:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:55,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:55,121 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:55,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Ended with exit code 0 [2022-01-18 15:20:55,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-01-18 15:20:55,322 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:55,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1131133826, now seen corresponding path program 366 times [2022-01-18 15:20:55,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:55,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978916173] [2022-01-18 15:20:55,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:55,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:55,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:55,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978916173] [2022-01-18 15:20:55,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978916173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:55,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292649304] [2022-01-18 15:20:55,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:55,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:55,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:55,395 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:55,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-01-18 15:20:55,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:20:55,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:55,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:55,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:55,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:20:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:55,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:55,913 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:55,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:55,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292649304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:55,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:55,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:55,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380174043] [2022-01-18 15:20:55,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:55,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:55,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:55,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:55,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:55,918 INFO L87 Difference]: Start difference. First operand 304 states and 897 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:56,264 INFO L93 Difference]: Finished difference Result 507 states and 1425 transitions. [2022-01-18 15:20:56,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:56,264 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:56,265 INFO L225 Difference]: With dead ends: 507 [2022-01-18 15:20:56,265 INFO L226 Difference]: Without dead ends: 507 [2022-01-18 15:20:56,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:56,265 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 163 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:56,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 251 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-18 15:20:56,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 313. [2022-01-18 15:20:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0) internal successors, (936), 312 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:56,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 936 transitions. [2022-01-18 15:20:56,269 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 936 transitions. Word has length 20 [2022-01-18 15:20:56,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:56,269 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 936 transitions. [2022-01-18 15:20:56,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 936 transitions. [2022-01-18 15:20:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:56,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:56,270 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:56,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Ended with exit code 0 [2022-01-18 15:20:56,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-01-18 15:20:56,470 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:56,470 INFO L85 PathProgramCache]: Analyzing trace with hash 143021028, now seen corresponding path program 367 times [2022-01-18 15:20:56,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:56,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84555696] [2022-01-18 15:20:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:56,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:56,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:56,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84555696] [2022-01-18 15:20:56,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84555696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:56,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903952271] [2022-01-18 15:20:56,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:56,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:56,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:56,545 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:56,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-01-18 15:20:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:56,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:56,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:20:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:56,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:57,050 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:57,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:57,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903952271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:57,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:57,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:20:57,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001143738] [2022-01-18 15:20:57,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:57,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:57,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:57,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:57,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:57,055 INFO L87 Difference]: Start difference. First operand 313 states and 936 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:57,363 INFO L93 Difference]: Finished difference Result 513 states and 1440 transitions. [2022-01-18 15:20:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:20:57,363 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:57,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:57,364 INFO L225 Difference]: With dead ends: 513 [2022-01-18 15:20:57,364 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 15:20:57,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:57,364 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 183 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:57,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 210 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:57,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 15:20:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 310. [2022-01-18 15:20:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9805825242718447) internal successors, (921), 309 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 921 transitions. [2022-01-18 15:20:57,368 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 921 transitions. Word has length 20 [2022-01-18 15:20:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:57,368 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 921 transitions. [2022-01-18 15:20:57,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 921 transitions. [2022-01-18 15:20:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:57,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:57,369 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:57,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Ended with exit code 0 [2022-01-18 15:20:57,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:57,569 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:57,569 INFO L85 PathProgramCache]: Analyzing trace with hash 145646804, now seen corresponding path program 368 times [2022-01-18 15:20:57,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:57,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168451460] [2022-01-18 15:20:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:57,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:57,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:57,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168451460] [2022-01-18 15:20:57,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168451460] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:57,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003654168] [2022-01-18 15:20:57,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:57,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:57,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:57,634 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:57,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-01-18 15:20:57,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:57,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:57,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:57,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:57,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:58,067 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:58,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:58,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003654168] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:58,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:58,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:20:58,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839521461] [2022-01-18 15:20:58,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:58,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:20:58,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:20:58,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:20:58,072 INFO L87 Difference]: Start difference. First operand 310 states and 921 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:58,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:58,246 INFO L93 Difference]: Finished difference Result 477 states and 1348 transitions. [2022-01-18 15:20:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:58,247 INFO L225 Difference]: With dead ends: 477 [2022-01-18 15:20:58,247 INFO L226 Difference]: Without dead ends: 477 [2022-01-18 15:20:58,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:58,247 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:58,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 121 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:20:58,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-18 15:20:58,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 307. [2022-01-18 15:20:58,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9705882352941178) internal successors, (909), 306 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:58,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 909 transitions. [2022-01-18 15:20:58,251 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 909 transitions. Word has length 20 [2022-01-18 15:20:58,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:58,251 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 909 transitions. [2022-01-18 15:20:58,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:58,251 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 909 transitions. [2022-01-18 15:20:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:58,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:58,251 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:58,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Ended with exit code 0 [2022-01-18 15:20:58,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:58,451 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1321137448, now seen corresponding path program 369 times [2022-01-18 15:20:58,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:58,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024316477] [2022-01-18 15:20:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:58,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:58,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:58,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024316477] [2022-01-18 15:20:58,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024316477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:58,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043894138] [2022-01-18 15:20:58,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:58,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:58,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:58,509 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:58,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-01-18 15:20:58,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:20:58,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:58,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:58,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:58,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:58,959 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:58,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:20:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:58,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043894138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:58,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:58,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:20:58,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40562515] [2022-01-18 15:20:58,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:58,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:58,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:58,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:58,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:58,964 INFO L87 Difference]: Start difference. First operand 307 states and 909 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:59,248 INFO L93 Difference]: Finished difference Result 468 states and 1321 transitions. [2022-01-18 15:20:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:59,248 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:20:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:59,249 INFO L225 Difference]: With dead ends: 468 [2022-01-18 15:20:59,249 INFO L226 Difference]: Without dead ends: 468 [2022-01-18 15:20:59,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:59,249 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 100 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:59,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 266 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-18 15:20:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 309. [2022-01-18 15:20:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9740259740259742) internal successors, (916), 308 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 916 transitions. [2022-01-18 15:20:59,252 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 916 transitions. Word has length 20 [2022-01-18 15:20:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:59,252 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 916 transitions. [2022-01-18 15:20:59,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 916 transitions. [2022-01-18 15:20:59,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:20:59,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:59,253 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:59,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Ended with exit code 0 [2022-01-18 15:20:59,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:59,453 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:59,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:59,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1065517497, now seen corresponding path program 370 times [2022-01-18 15:20:59,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:59,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483957539] [2022-01-18 15:20:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:59,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:59,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483957539] [2022-01-18 15:20:59,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483957539] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680318113] [2022-01-18 15:20:59,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:59,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:59,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:59,502 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:59,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-01-18 15:20:59,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:59,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:59,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:59,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:59,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:20:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:59,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:59,932 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:20:59,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-01-18 15:20:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:59,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680318113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:59,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:59,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 15:20:59,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659226264] [2022-01-18 15:20:59,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:59,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:20:59,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:59,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:20:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:20:59,958 INFO L87 Difference]: Start difference. First operand 309 states and 916 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:00,269 INFO L93 Difference]: Finished difference Result 393 states and 1111 transitions. [2022-01-18 15:21:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:00,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:00,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:00,270 INFO L225 Difference]: With dead ends: 393 [2022-01-18 15:21:00,270 INFO L226 Difference]: Without dead ends: 285 [2022-01-18 15:21:00,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:21:00,270 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 119 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:00,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 149 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:00,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-18 15:21:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-01-18 15:21:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.954225352112676) internal successors, (839), 284 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 839 transitions. [2022-01-18 15:21:00,273 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 839 transitions. Word has length 20 [2022-01-18 15:21:00,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:00,273 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 839 transitions. [2022-01-18 15:21:00,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 839 transitions. [2022-01-18 15:21:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:00,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:00,273 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:00,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Ended with exit code 0 [2022-01-18 15:21:00,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:00,474 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:00,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:00,474 INFO L85 PathProgramCache]: Analyzing trace with hash -425786254, now seen corresponding path program 371 times [2022-01-18 15:21:00,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:00,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372646296] [2022-01-18 15:21:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:00,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:00,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:00,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372646296] [2022-01-18 15:21:00,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372646296] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:00,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196947448] [2022-01-18 15:21:00,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:21:00,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:00,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:00,560 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:00,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-01-18 15:21:00,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:21:00,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:00,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:00,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:00,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:21:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:00,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:01,153 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:01,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:01,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196947448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:01,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:01,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:01,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717061584] [2022-01-18 15:21:01,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:01,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:01,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:01,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:01,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:01,158 INFO L87 Difference]: Start difference. First operand 285 states and 839 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:01,555 INFO L93 Difference]: Finished difference Result 525 states and 1507 transitions. [2022-01-18 15:21:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:01,555 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:01,556 INFO L225 Difference]: With dead ends: 525 [2022-01-18 15:21:01,556 INFO L226 Difference]: Without dead ends: 525 [2022-01-18 15:21:01,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:21:01,556 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 179 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:01,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 183 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-18 15:21:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 297. [2022-01-18 15:21:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.016891891891892) internal successors, (893), 296 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 893 transitions. [2022-01-18 15:21:01,560 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 893 transitions. Word has length 20 [2022-01-18 15:21:01,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:01,560 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 893 transitions. [2022-01-18 15:21:01,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 893 transitions. [2022-01-18 15:21:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:01,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:01,560 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:01,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Ended with exit code 0 [2022-01-18 15:21:01,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:01,761 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:01,761 INFO L85 PathProgramCache]: Analyzing trace with hash 456291180, now seen corresponding path program 372 times [2022-01-18 15:21:01,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:01,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43201469] [2022-01-18 15:21:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:01,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:01,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:01,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43201469] [2022-01-18 15:21:01,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43201469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:01,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411945843] [2022-01-18 15:21:01,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:21:01,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:01,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:01,844 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:01,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-01-18 15:21:02,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:21:02,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:02,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:02,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:02,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:21:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:02,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:02,390 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:02,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:02,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411945843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:02,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:02,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:21:02,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499867213] [2022-01-18 15:21:02,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:02,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:21:02,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:02,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:21:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:02,395 INFO L87 Difference]: Start difference. First operand 297 states and 893 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:02,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:02,749 INFO L93 Difference]: Finished difference Result 511 states and 1456 transitions. [2022-01-18 15:21:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:02,749 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:02,750 INFO L225 Difference]: With dead ends: 511 [2022-01-18 15:21:02,750 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 15:21:02,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:21:02,750 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 145 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:02,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 183 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 15:21:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 300. [2022-01-18 15:21:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9933110367892977) internal successors, (895), 299 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2022-01-18 15:21:02,754 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2022-01-18 15:21:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:02,754 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2022-01-18 15:21:02,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2022-01-18 15:21:02,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:02,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:02,754 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:02,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:02,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:02,955 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:02,955 INFO L85 PathProgramCache]: Analyzing trace with hash 315111080, now seen corresponding path program 373 times [2022-01-18 15:21:02,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:02,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372383255] [2022-01-18 15:21:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:02,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:03,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:03,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372383255] [2022-01-18 15:21:03,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372383255] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:03,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80578121] [2022-01-18 15:21:03,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:21:03,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:03,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:03,050 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:03,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-01-18 15:21:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:03,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:21:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:03,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:03,643 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:03,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:03,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80578121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:03,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:03,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:03,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646874717] [2022-01-18 15:21:03,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:03,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:03,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:03,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:03,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:03,648 INFO L87 Difference]: Start difference. First operand 300 states and 895 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:04,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:04,237 INFO L93 Difference]: Finished difference Result 582 states and 1654 transitions. [2022-01-18 15:21:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:21:04,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:04,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:04,239 INFO L225 Difference]: With dead ends: 582 [2022-01-18 15:21:04,239 INFO L226 Difference]: Without dead ends: 582 [2022-01-18 15:21:04,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:21:04,239 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 199 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:04,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 259 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:21:04,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-18 15:21:04,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 303. [2022-01-18 15:21:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.013245033112583) internal successors, (910), 302 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2022-01-18 15:21:04,243 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2022-01-18 15:21:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:04,243 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2022-01-18 15:21:04,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2022-01-18 15:21:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:04,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:04,243 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:04,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Ended with exit code 0 [2022-01-18 15:21:04,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2022-01-18 15:21:04,444 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1309486700, now seen corresponding path program 374 times [2022-01-18 15:21:04,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:04,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802817857] [2022-01-18 15:21:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:04,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:04,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:04,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802817857] [2022-01-18 15:21:04,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802817857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:04,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748589777] [2022-01-18 15:21:04,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:21:04,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:04,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:04,538 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:04,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-01-18 15:21:04,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:04,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:04,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:04,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:04,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:21:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:04,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:05,128 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:05,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:05,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748589777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:05,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:05,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:05,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806367223] [2022-01-18 15:21:05,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:05,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:05,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:05,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:05,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:05,133 INFO L87 Difference]: Start difference. First operand 303 states and 910 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:05,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:05,749 INFO L93 Difference]: Finished difference Result 551 states and 1587 transitions. [2022-01-18 15:21:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:21:05,749 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:05,750 INFO L225 Difference]: With dead ends: 551 [2022-01-18 15:21:05,750 INFO L226 Difference]: Without dead ends: 551 [2022-01-18 15:21:05,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:21:05,750 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:05,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 300 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:21:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-18 15:21:05,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 300. [2022-01-18 15:21:05,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9933110367892977) internal successors, (895), 299 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2022-01-18 15:21:05,754 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2022-01-18 15:21:05,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:05,754 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2022-01-18 15:21:05,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2022-01-18 15:21:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:05,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:05,755 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:05,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Ended with exit code 0 [2022-01-18 15:21:05,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2022-01-18 15:21:05,955 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:05,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:05,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2005027464, now seen corresponding path program 375 times [2022-01-18 15:21:05,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:05,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135072879] [2022-01-18 15:21:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:05,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:06,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:06,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135072879] [2022-01-18 15:21:06,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135072879] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:06,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255748459] [2022-01-18 15:21:06,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:21:06,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:06,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:06,049 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:06,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-01-18 15:21:06,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:21:06,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:06,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:06,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:06,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:21:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:06,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:06,597 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:06,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:06,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255748459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:06,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:06,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:21:06,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742621352] [2022-01-18 15:21:06,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:06,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:21:06,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:06,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:21:06,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:06,602 INFO L87 Difference]: Start difference. First operand 300 states and 895 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:07,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:07,062 INFO L93 Difference]: Finished difference Result 548 states and 1535 transitions. [2022-01-18 15:21:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:21:07,063 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:07,063 INFO L225 Difference]: With dead ends: 548 [2022-01-18 15:21:07,063 INFO L226 Difference]: Without dead ends: 542 [2022-01-18 15:21:07,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:21:07,063 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 213 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:07,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 195 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-18 15:21:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 304. [2022-01-18 15:21:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0) internal successors, (909), 303 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2022-01-18 15:21:07,067 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 20 [2022-01-18 15:21:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:07,067 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2022-01-18 15:21:07,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:07,067 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2022-01-18 15:21:07,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:07,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:07,068 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:07,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Ended with exit code 0 [2022-01-18 15:21:07,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-01-18 15:21:07,268 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1981127550, now seen corresponding path program 376 times [2022-01-18 15:21:07,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:07,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760984269] [2022-01-18 15:21:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:07,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:07,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:07,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760984269] [2022-01-18 15:21:07,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760984269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:07,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194605641] [2022-01-18 15:21:07,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:21:07,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:07,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:07,347 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:07,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-01-18 15:21:07,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:21:07,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:07,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:07,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:07,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:21:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:07,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:07,869 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:07,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:07,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194605641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:07,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:07,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:21:07,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144667355] [2022-01-18 15:21:07,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:07,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:21:07,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:07,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:21:07,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:21:07,874 INFO L87 Difference]: Start difference. First operand 304 states and 909 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:08,392 INFO L93 Difference]: Finished difference Result 554 states and 1556 transitions. [2022-01-18 15:21:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:21:08,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:08,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:08,393 INFO L225 Difference]: With dead ends: 554 [2022-01-18 15:21:08,393 INFO L226 Difference]: Without dead ends: 554 [2022-01-18 15:21:08,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:21:08,393 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 154 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:08,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 247 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-18 15:21:08,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 301. [2022-01-18 15:21:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.9966666666666666) internal successors, (899), 300 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2022-01-18 15:21:08,397 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2022-01-18 15:21:08,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:08,397 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2022-01-18 15:21:08,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2022-01-18 15:21:08,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:08,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:08,398 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:08,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Ended with exit code 0 [2022-01-18 15:21:08,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-01-18 15:21:08,598 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:08,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:08,598 INFO L85 PathProgramCache]: Analyzing trace with hash -952346098, now seen corresponding path program 377 times [2022-01-18 15:21:08,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:08,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040369853] [2022-01-18 15:21:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:08,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:08,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:08,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040369853] [2022-01-18 15:21:08,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040369853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:08,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608885403] [2022-01-18 15:21:08,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:21:08,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:08,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:08,691 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:08,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-01-18 15:21:08,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:21:08,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:08,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:08,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:09,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:21:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:09,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:09,254 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:09,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:09,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608885403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:09,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:09,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:09,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910749862] [2022-01-18 15:21:09,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:09,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:09,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:09,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:09,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:09,261 INFO L87 Difference]: Start difference. First operand 301 states and 899 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:09,645 INFO L93 Difference]: Finished difference Result 508 states and 1482 transitions. [2022-01-18 15:21:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:09,645 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:09,646 INFO L225 Difference]: With dead ends: 508 [2022-01-18 15:21:09,646 INFO L226 Difference]: Without dead ends: 508 [2022-01-18 15:21:09,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:21:09,646 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 160 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:09,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 201 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-18 15:21:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 307. [2022-01-18 15:21:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.026143790849673) internal successors, (926), 306 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2022-01-18 15:21:09,650 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2022-01-18 15:21:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:09,650 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2022-01-18 15:21:09,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:09,650 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2022-01-18 15:21:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:09,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:09,651 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:09,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:09,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-01-18 15:21:09,851 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:09,851 INFO L85 PathProgramCache]: Analyzing trace with hash 42029522, now seen corresponding path program 378 times [2022-01-18 15:21:09,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:09,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232726931] [2022-01-18 15:21:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:09,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:09,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:09,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232726931] [2022-01-18 15:21:09,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232726931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:09,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213388301] [2022-01-18 15:21:09,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:21:09,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:09,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:09,938 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:09,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-01-18 15:21:10,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:21:10,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:10,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:10,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:10,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:21:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:10,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:10,514 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:10,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:10,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213388301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:10,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:10,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:10,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141694120] [2022-01-18 15:21:10,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:10,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:10,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:10,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:10,519 INFO L87 Difference]: Start difference. First operand 307 states and 926 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:10,972 INFO L93 Difference]: Finished difference Result 502 states and 1464 transitions. [2022-01-18 15:21:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:21:10,972 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:10,973 INFO L225 Difference]: With dead ends: 502 [2022-01-18 15:21:10,973 INFO L226 Difference]: Without dead ends: 502 [2022-01-18 15:21:10,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:21:10,973 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 150 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:10,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 220 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-18 15:21:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 304. [2022-01-18 15:21:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0066006600660065) internal successors, (911), 303 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2022-01-18 15:21:10,977 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 20 [2022-01-18 15:21:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:10,977 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2022-01-18 15:21:10,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2022-01-18 15:21:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:10,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:10,978 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:10,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Ended with exit code 0 [2022-01-18 15:21:11,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2022-01-18 15:21:11,178 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:11,178 INFO L85 PathProgramCache]: Analyzing trace with hash -253397660, now seen corresponding path program 379 times [2022-01-18 15:21:11,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:11,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540305704] [2022-01-18 15:21:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:11,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:11,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:11,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540305704] [2022-01-18 15:21:11,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540305704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:11,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418846695] [2022-01-18 15:21:11,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:21:11,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:11,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:11,255 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:11,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-01-18 15:21:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:11,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:11,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:11,810 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:11,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:11,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418846695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:11,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:11,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:11,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015967412] [2022-01-18 15:21:11,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:11,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:11,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:11,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:11,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:11,815 INFO L87 Difference]: Start difference. First operand 304 states and 911 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:12,131 INFO L93 Difference]: Finished difference Result 463 states and 1357 transitions. [2022-01-18 15:21:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:12,132 INFO L225 Difference]: With dead ends: 463 [2022-01-18 15:21:12,132 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 15:21:12,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:21:12,133 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 107 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:12,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 186 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 15:21:12,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 301. [2022-01-18 15:21:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.9966666666666666) internal successors, (899), 300 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2022-01-18 15:21:12,136 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2022-01-18 15:21:12,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:12,136 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2022-01-18 15:21:12,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:12,136 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2022-01-18 15:21:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:12,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:12,137 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:12,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Ended with exit code 0 [2022-01-18 15:21:12,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:12,337 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:12,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1089945976, now seen corresponding path program 380 times [2022-01-18 15:21:12,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:12,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408125442] [2022-01-18 15:21:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:12,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:12,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:12,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408125442] [2022-01-18 15:21:12,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408125442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:12,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134545221] [2022-01-18 15:21:12,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:21:12,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:12,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:12,412 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:12,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-01-18 15:21:12,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:12,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:12,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:12,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:12,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:21:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:12,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:12,908 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:12,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:12,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134545221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:12,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:12,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:21:12,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458131053] [2022-01-18 15:21:12,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:12,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:21:12,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:12,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:21:12,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:21:12,913 INFO L87 Difference]: Start difference. First operand 301 states and 899 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:13,183 INFO L93 Difference]: Finished difference Result 478 states and 1367 transitions. [2022-01-18 15:21:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:13,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:13,184 INFO L225 Difference]: With dead ends: 478 [2022-01-18 15:21:13,184 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 15:21:13,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:13,184 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 108 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:13,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 157 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 15:21:13,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 309. [2022-01-18 15:21:13,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0032467532467533) internal successors, (925), 308 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:13,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2022-01-18 15:21:13,188 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2022-01-18 15:21:13,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:13,188 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2022-01-18 15:21:13,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:13,188 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2022-01-18 15:21:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:13,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:13,188 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:13,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Ended with exit code 0 [2022-01-18 15:21:13,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2022-01-18 15:21:13,389 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:13,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1066046062, now seen corresponding path program 381 times [2022-01-18 15:21:13,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:13,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722868858] [2022-01-18 15:21:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:13,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:13,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:13,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722868858] [2022-01-18 15:21:13,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722868858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:13,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452937087] [2022-01-18 15:21:13,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:21:13,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:13,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:13,472 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:13,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-01-18 15:21:13,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:21:13,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:13,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:13,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:13,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:21:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:13,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:14,019 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:14,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:14,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452937087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:14,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:14,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:14,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767466075] [2022-01-18 15:21:14,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:14,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:14,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:14,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:14,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:14,024 INFO L87 Difference]: Start difference. First operand 309 states and 925 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:14,406 INFO L93 Difference]: Finished difference Result 484 states and 1388 transitions. [2022-01-18 15:21:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:21:14,407 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:14,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:14,407 INFO L225 Difference]: With dead ends: 484 [2022-01-18 15:21:14,407 INFO L226 Difference]: Without dead ends: 484 [2022-01-18 15:21:14,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:21:14,408 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 145 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:14,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 218 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-18 15:21:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 305. [2022-01-18 15:21:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9967105263157894) internal successors, (911), 304 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2022-01-18 15:21:14,411 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2022-01-18 15:21:14,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:14,411 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2022-01-18 15:21:14,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:14,412 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2022-01-18 15:21:14,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:14,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:14,413 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:14,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Ended with exit code 0 [2022-01-18 15:21:14,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:14,624 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:14,624 INFO L85 PathProgramCache]: Analyzing trace with hash 417088876, now seen corresponding path program 382 times [2022-01-18 15:21:14,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:14,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767999961] [2022-01-18 15:21:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:14,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:14,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:14,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767999961] [2022-01-18 15:21:14,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767999961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:14,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232024032] [2022-01-18 15:21:14,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:21:14,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:14,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:14,715 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:14,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-01-18 15:21:14,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:21:14,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:14,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:14,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:15,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:15,250 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:15,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:15,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232024032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:15,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:15,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:15,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624098967] [2022-01-18 15:21:15,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:15,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:15,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:15,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:15,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:15,255 INFO L87 Difference]: Start difference. First operand 305 states and 911 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:15,594 INFO L93 Difference]: Finished difference Result 459 states and 1338 transitions. [2022-01-18 15:21:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:15,595 INFO L225 Difference]: With dead ends: 459 [2022-01-18 15:21:15,595 INFO L226 Difference]: Without dead ends: 459 [2022-01-18 15:21:15,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:21:15,595 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 116 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:15,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 200 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:15,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-18 15:21:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 302. [2022-01-18 15:21:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9966777408637872) internal successors, (902), 301 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 902 transitions. [2022-01-18 15:21:15,599 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 902 transitions. Word has length 20 [2022-01-18 15:21:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:15,599 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 902 transitions. [2022-01-18 15:21:15,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 902 transitions. [2022-01-18 15:21:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:15,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:15,600 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:15,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:15,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:15,816 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:15,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:15,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2013124188, now seen corresponding path program 383 times [2022-01-18 15:21:15,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:15,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179071244] [2022-01-18 15:21:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:15,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:15,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:15,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179071244] [2022-01-18 15:21:15,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179071244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:15,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506561211] [2022-01-18 15:21:15,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:21:15,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:15,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:15,902 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:15,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-01-18 15:21:16,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:21:16,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:16,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:16,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:16,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:21:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:16,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:16,471 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:16,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:16,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506561211] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:16,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:16,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:16,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108985179] [2022-01-18 15:21:16,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:16,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:16,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:16,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:16,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:16,476 INFO L87 Difference]: Start difference. First operand 302 states and 902 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:16,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:16,853 INFO L93 Difference]: Finished difference Result 556 states and 1611 transitions. [2022-01-18 15:21:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:16,853 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:16,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:16,854 INFO L225 Difference]: With dead ends: 556 [2022-01-18 15:21:16,854 INFO L226 Difference]: Without dead ends: 556 [2022-01-18 15:21:16,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:21:16,855 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:16,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 204 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-18 15:21:16,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 305. [2022-01-18 15:21:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9967105263157894) internal successors, (911), 304 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:16,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2022-01-18 15:21:16,859 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2022-01-18 15:21:16,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:16,859 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2022-01-18 15:21:16,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2022-01-18 15:21:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:16,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:16,860 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:16,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Ended with exit code 0 [2022-01-18 15:21:17,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2022-01-18 15:21:17,060 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1018748568, now seen corresponding path program 384 times [2022-01-18 15:21:17,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:17,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766715569] [2022-01-18 15:21:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:17,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:17,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:17,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766715569] [2022-01-18 15:21:17,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766715569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:17,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865768796] [2022-01-18 15:21:17,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:21:17,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:17,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:17,140 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:17,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-01-18 15:21:17,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:21:17,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:17,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:17,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:17,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:21:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:17,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:17,684 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:17,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:17,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865768796] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:17,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:17,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:21:17,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14902442] [2022-01-18 15:21:17,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:17,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:21:17,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:21:17,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:21:17,689 INFO L87 Difference]: Start difference. First operand 305 states and 911 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:18,028 INFO L93 Difference]: Finished difference Result 558 states and 1615 transitions. [2022-01-18 15:21:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:21:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:18,030 INFO L225 Difference]: With dead ends: 558 [2022-01-18 15:21:18,030 INFO L226 Difference]: Without dead ends: 558 [2022-01-18 15:21:18,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:21:18,030 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:18,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 182 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-18 15:21:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 302. [2022-01-18 15:21:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9767441860465116) internal successors, (896), 301 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 896 transitions. [2022-01-18 15:21:18,034 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 896 transitions. Word has length 20 [2022-01-18 15:21:18,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:18,034 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 896 transitions. [2022-01-18 15:21:18,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:18,034 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 896 transitions. [2022-01-18 15:21:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:18,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:18,034 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:18,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:18,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:18,252 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:18,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:18,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1314175750, now seen corresponding path program 385 times [2022-01-18 15:21:18,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:18,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199932024] [2022-01-18 15:21:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:18,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:18,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:18,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199932024] [2022-01-18 15:21:18,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199932024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:18,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757708152] [2022-01-18 15:21:18,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:21:18,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:18,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:18,329 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:18,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-01-18 15:21:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:18,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:18,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:18,883 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:18,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:18,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757708152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:18,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:18,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:18,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565240582] [2022-01-18 15:21:18,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:18,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:18,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:18,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:18,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:18,888 INFO L87 Difference]: Start difference. First operand 302 states and 896 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:19,231 INFO L93 Difference]: Finished difference Result 509 states and 1479 transitions. [2022-01-18 15:21:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:19,232 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:19,232 INFO L225 Difference]: With dead ends: 509 [2022-01-18 15:21:19,232 INFO L226 Difference]: Without dead ends: 509 [2022-01-18 15:21:19,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:21:19,233 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 121 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:19,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 230 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-18 15:21:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 289. [2022-01-18 15:21:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.96875) internal successors, (855), 288 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 855 transitions. [2022-01-18 15:21:19,236 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 855 transitions. Word has length 20 [2022-01-18 15:21:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:19,236 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 855 transitions. [2022-01-18 15:21:19,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 855 transitions. [2022-01-18 15:21:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:19,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:19,237 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:19,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Ended with exit code 0 [2022-01-18 15:21:19,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:19,437 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:19,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:19,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2076262804, now seen corresponding path program 386 times [2022-01-18 15:21:19,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:19,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002491361] [2022-01-18 15:21:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:19,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:19,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:19,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002491361] [2022-01-18 15:21:19,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002491361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:19,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583694277] [2022-01-18 15:21:19,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:21:19,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:19,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:19,505 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:19,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-01-18 15:21:19,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:19,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:19,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:19,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:19,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:20,035 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:20,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:20,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583694277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:20,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:20,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:21:20,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202814772] [2022-01-18 15:21:20,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:20,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:21:20,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:20,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:21:20,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:20,040 INFO L87 Difference]: Start difference. First operand 289 states and 855 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:20,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:20,347 INFO L93 Difference]: Finished difference Result 544 states and 1551 transitions. [2022-01-18 15:21:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:20,348 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:20,349 INFO L225 Difference]: With dead ends: 544 [2022-01-18 15:21:20,349 INFO L226 Difference]: Without dead ends: 544 [2022-01-18 15:21:20,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:21:20,349 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 142 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:20,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 218 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:20,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-18 15:21:20,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 286. [2022-01-18 15:21:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.957894736842105) internal successors, (843), 285 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 843 transitions. [2022-01-18 15:21:20,353 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 843 transitions. Word has length 20 [2022-01-18 15:21:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:20,353 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 843 transitions. [2022-01-18 15:21:20,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:20,353 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 843 transitions. [2022-01-18 15:21:20,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:20,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:20,353 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:20,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Ended with exit code 0 [2022-01-18 15:21:20,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:20,554 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:20,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:20,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1083465140, now seen corresponding path program 387 times [2022-01-18 15:21:20,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:20,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083941172] [2022-01-18 15:21:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:20,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:20,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:20,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083941172] [2022-01-18 15:21:20,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083941172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:20,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99604859] [2022-01-18 15:21:20,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:21:20,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:20,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:20,623 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:20,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-01-18 15:21:20,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:21:20,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:20,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:20,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:21:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:20,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:21,087 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:21,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:21,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99604859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:21,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:21,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:21:21,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310450936] [2022-01-18 15:21:21,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:21,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:21:21,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:21,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:21:21,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:21:21,092 INFO L87 Difference]: Start difference. First operand 286 states and 843 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:21,323 INFO L93 Difference]: Finished difference Result 442 states and 1250 transitions. [2022-01-18 15:21:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:21,324 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:21,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:21,324 INFO L225 Difference]: With dead ends: 442 [2022-01-18 15:21:21,324 INFO L226 Difference]: Without dead ends: 436 [2022-01-18 15:21:21,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:21,325 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 105 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:21,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 119 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-18 15:21:21,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 304. [2022-01-18 15:21:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9504950495049505) internal successors, (894), 303 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 894 transitions. [2022-01-18 15:21:21,328 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 894 transitions. Word has length 20 [2022-01-18 15:21:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:21,328 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 894 transitions. [2022-01-18 15:21:21,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 894 transitions. [2022-01-18 15:21:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:21,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:21,329 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:21,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Ended with exit code 0 [2022-01-18 15:21:21,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2022-01-18 15:21:21,529 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:21,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1107365054, now seen corresponding path program 388 times [2022-01-18 15:21:21,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:21,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23881185] [2022-01-18 15:21:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:21,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:21,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:21,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23881185] [2022-01-18 15:21:21,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23881185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:21,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613112392] [2022-01-18 15:21:21,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:21:21,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:21,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:21,601 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:21,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-01-18 15:21:21,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:21:21,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:21,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:21,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:21,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:21:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:21,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:22,088 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:22,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:22,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613112392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:22,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:22,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:21:22,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303556431] [2022-01-18 15:21:22,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:22,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:21:22,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:22,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:21:22,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:21:22,093 INFO L87 Difference]: Start difference. First operand 304 states and 894 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:22,441 INFO L93 Difference]: Finished difference Result 448 states and 1271 transitions. [2022-01-18 15:21:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:21:22,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:22,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:22,442 INFO L225 Difference]: With dead ends: 448 [2022-01-18 15:21:22,442 INFO L226 Difference]: Without dead ends: 448 [2022-01-18 15:21:22,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:22,442 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 94 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:22,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 198 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-18 15:21:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 302. [2022-01-18 15:21:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.953488372093023) internal successors, (889), 301 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 889 transitions. [2022-01-18 15:21:22,446 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 889 transitions. Word has length 20 [2022-01-18 15:21:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:22,446 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 889 transitions. [2022-01-18 15:21:22,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 889 transitions. [2022-01-18 15:21:22,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:22,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:22,446 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:22,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:22,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-01-18 15:21:22,647 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:22,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:22,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1704467304, now seen corresponding path program 389 times [2022-01-18 15:21:22,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:22,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783408059] [2022-01-18 15:21:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:22,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:22,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:22,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783408059] [2022-01-18 15:21:22,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783408059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:22,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704978687] [2022-01-18 15:21:22,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:21:22,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:22,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:22,716 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:22,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-01-18 15:21:22,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:21:22,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:22,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:22,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:23,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:23,212 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:23,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:23,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704978687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:23,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:23,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:21:23,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941178403] [2022-01-18 15:21:23,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:23,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:21:23,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:23,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:21:23,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:23,217 INFO L87 Difference]: Start difference. First operand 302 states and 889 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:23,530 INFO L93 Difference]: Finished difference Result 431 states and 1243 transitions. [2022-01-18 15:21:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:23,531 INFO L225 Difference]: With dead ends: 431 [2022-01-18 15:21:23,531 INFO L226 Difference]: Without dead ends: 431 [2022-01-18 15:21:23,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:21:23,532 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 126 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:23,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 186 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:23,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-18 15:21:23,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 300. [2022-01-18 15:21:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9565217391304346) internal successors, (884), 299 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:23,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 884 transitions. [2022-01-18 15:21:23,535 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 884 transitions. Word has length 20 [2022-01-18 15:21:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:23,535 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 884 transitions. [2022-01-18 15:21:23,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 884 transitions. [2022-01-18 15:21:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:23,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:23,536 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:23,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:23,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:23,736 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash 478071362, now seen corresponding path program 390 times [2022-01-18 15:21:23,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:23,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169212681] [2022-01-18 15:21:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:23,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:23,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:23,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169212681] [2022-01-18 15:21:23,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169212681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:23,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46075338] [2022-01-18 15:21:23,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:21:23,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:23,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:23,805 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:23,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-01-18 15:21:24,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:21:24,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:24,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:24,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:24,246 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:21:24,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-18 15:21:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:24,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46075338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:24,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:24,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 15:21:24,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018710344] [2022-01-18 15:21:24,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:24,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:21:24,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:24,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:21:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:21:24,251 INFO L87 Difference]: Start difference. First operand 300 states and 884 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:24,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:24,484 INFO L93 Difference]: Finished difference Result 456 states and 1297 transitions. [2022-01-18 15:21:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:24,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:24,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:24,485 INFO L225 Difference]: With dead ends: 456 [2022-01-18 15:21:24,485 INFO L226 Difference]: Without dead ends: 456 [2022-01-18 15:21:24,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:21:24,486 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 87 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:24,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 148 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-18 15:21:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 288. [2022-01-18 15:21:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.9547038327526134) internal successors, (848), 287 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 848 transitions. [2022-01-18 15:21:24,496 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 848 transitions. Word has length 20 [2022-01-18 15:21:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:24,497 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 848 transitions. [2022-01-18 15:21:24,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 848 transitions. [2022-01-18 15:21:24,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:24,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:24,497 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:24,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Ended with exit code 0 [2022-01-18 15:21:24,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2022-01-18 15:21:24,697 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:24,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash -222241218, now seen corresponding path program 391 times [2022-01-18 15:21:24,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:24,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859462404] [2022-01-18 15:21:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:24,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:24,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:24,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859462404] [2022-01-18 15:21:24,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859462404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:24,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31337396] [2022-01-18 15:21:24,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:21:24,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:24,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:24,795 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:24,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-01-18 15:21:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:25,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:25,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:25,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:21:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:25,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:25,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:25,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:25,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31337396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:25,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:25,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:21:25,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392241310] [2022-01-18 15:21:25,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:25,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:25,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:25,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:25,527 INFO L87 Difference]: Start difference. First operand 288 states and 848 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:25,990 INFO L93 Difference]: Finished difference Result 369 states and 1060 transitions. [2022-01-18 15:21:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:25,990 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:25,990 INFO L225 Difference]: With dead ends: 369 [2022-01-18 15:21:25,990 INFO L226 Difference]: Without dead ends: 369 [2022-01-18 15:21:25,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:21:25,991 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 84 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:25,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 194 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-18 15:21:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 297. [2022-01-18 15:21:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.983108108108108) internal successors, (883), 296 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 883 transitions. [2022-01-18 15:21:25,994 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 883 transitions. Word has length 20 [2022-01-18 15:21:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:25,994 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 883 transitions. [2022-01-18 15:21:25,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 883 transitions. [2022-01-18 15:21:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:25,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:25,995 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:26,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:26,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:26,195 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:26,195 INFO L85 PathProgramCache]: Analyzing trace with hash 659836216, now seen corresponding path program 392 times [2022-01-18 15:21:26,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:26,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305006488] [2022-01-18 15:21:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:26,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:26,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:26,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305006488] [2022-01-18 15:21:26,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305006488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:26,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075311306] [2022-01-18 15:21:26,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:21:26,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:26,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:26,296 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:26,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-01-18 15:21:26,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:26,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:26,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:26,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:21:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:26,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:26,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:26,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:27,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075311306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:27,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:27,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:27,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710906289] [2022-01-18 15:21:27,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:27,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:27,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:27,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:27,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:27,062 INFO L87 Difference]: Start difference. First operand 297 states and 883 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:27,518 INFO L93 Difference]: Finished difference Result 375 states and 1067 transitions. [2022-01-18 15:21:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:21:27,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:27,518 INFO L225 Difference]: With dead ends: 375 [2022-01-18 15:21:27,518 INFO L226 Difference]: Without dead ends: 369 [2022-01-18 15:21:27,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:21:27,519 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 106 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:27,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 178 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:27,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-18 15:21:27,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 294. [2022-01-18 15:21:27,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9761092150170647) internal successors, (872), 293 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2022-01-18 15:21:27,522 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2022-01-18 15:21:27,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:27,522 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2022-01-18 15:21:27,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2022-01-18 15:21:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:27,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:27,522 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:27,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:27,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:27,723 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:27,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash 124606414, now seen corresponding path program 393 times [2022-01-18 15:21:27,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:27,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068302926] [2022-01-18 15:21:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:27,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:27,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:27,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068302926] [2022-01-18 15:21:27,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068302926] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:27,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380582099] [2022-01-18 15:21:27,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:21:27,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:27,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:27,808 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:27,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-01-18 15:21:28,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:21:28,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:28,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:28,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:28,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:21:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:28,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:28,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:28,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:28,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380582099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:28,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:28,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:21:28,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645716854] [2022-01-18 15:21:28,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:28,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:21:28,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:28,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:21:28,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:21:28,532 INFO L87 Difference]: Start difference. First operand 294 states and 872 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:28,906 INFO L93 Difference]: Finished difference Result 339 states and 985 transitions. [2022-01-18 15:21:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:28,914 INFO L225 Difference]: With dead ends: 339 [2022-01-18 15:21:28,914 INFO L226 Difference]: Without dead ends: 327 [2022-01-18 15:21:28,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:21:28,914 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 60 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:28,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 90 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:28,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-18 15:21:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2022-01-18 15:21:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2022-01-18 15:21:28,917 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2022-01-18 15:21:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:28,918 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2022-01-18 15:21:28,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2022-01-18 15:21:28,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:28,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:28,918 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:28,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:29,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:29,118 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:29,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1270739656, now seen corresponding path program 394 times [2022-01-18 15:21:29,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:29,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087042683] [2022-01-18 15:21:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:29,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:29,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:29,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087042683] [2022-01-18 15:21:29,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087042683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:29,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844733376] [2022-01-18 15:21:29,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:21:29,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:29,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:29,223 INFO L229 MonitoredProcess]: Starting monitored process 395 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:29,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-01-18 15:21:29,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:21:29,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:29,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:29,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:29,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 73 [2022-01-18 15:21:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:29,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:29,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:29,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:29,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844733376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:29,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:29,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:21:29,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711569681] [2022-01-18 15:21:29,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:29,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:29,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:29,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:29,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:29,976 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:30,478 INFO L93 Difference]: Finished difference Result 456 states and 1278 transitions. [2022-01-18 15:21:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:21:30,478 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:30,479 INFO L225 Difference]: With dead ends: 456 [2022-01-18 15:21:30,479 INFO L226 Difference]: Without dead ends: 456 [2022-01-18 15:21:30,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:21:30,479 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 162 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:30,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 192 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-18 15:21:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 299. [2022-01-18 15:21:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.01006711409396) internal successors, (897), 298 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 897 transitions. [2022-01-18 15:21:30,483 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 897 transitions. Word has length 20 [2022-01-18 15:21:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:30,483 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 897 transitions. [2022-01-18 15:21:30,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 897 transitions. [2022-01-18 15:21:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:30,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:30,483 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:30,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:30,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:30,684 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2142150206, now seen corresponding path program 395 times [2022-01-18 15:21:30,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:30,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310146507] [2022-01-18 15:21:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:30,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:30,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:30,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310146507] [2022-01-18 15:21:30,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310146507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:30,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81677520] [2022-01-18 15:21:30,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:21:30,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:30,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:30,766 INFO L229 MonitoredProcess]: Starting monitored process 396 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:30,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-01-18 15:21:30,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:30,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:30,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:30,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:31,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 73 [2022-01-18 15:21:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:31,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:31,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:31,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:31,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81677520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:31,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:31,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:21:31,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520023518] [2022-01-18 15:21:31,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:31,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:21:31,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:31,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:21:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:21:31,567 INFO L87 Difference]: Start difference. First operand 299 states and 897 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:32,101 INFO L93 Difference]: Finished difference Result 485 states and 1324 transitions. [2022-01-18 15:21:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:21:32,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:32,102 INFO L225 Difference]: With dead ends: 485 [2022-01-18 15:21:32,102 INFO L226 Difference]: Without dead ends: 479 [2022-01-18 15:21:32,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:21:32,102 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 138 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:32,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 270 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-18 15:21:32,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 302. [2022-01-18 15:21:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9867109634551494) internal successors, (899), 301 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2022-01-18 15:21:32,106 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2022-01-18 15:21:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:32,106 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2022-01-18 15:21:32,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2022-01-18 15:21:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:32,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:32,107 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:32,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Ended with exit code 0 [2022-01-18 15:21:32,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:32,307 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:32,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2011636990, now seen corresponding path program 396 times [2022-01-18 15:21:32,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:32,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667658308] [2022-01-18 15:21:32,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:32,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:32,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:32,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667658308] [2022-01-18 15:21:32,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667658308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:32,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764813153] [2022-01-18 15:21:32,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:21:32,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:32,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:32,419 INFO L229 MonitoredProcess]: Starting monitored process 397 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:32,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-01-18 15:21:32,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:21:32,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:32,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:32,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:32,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:21:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:32,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:33,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:33,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:33,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764813153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:33,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:33,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:21:33,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218933708] [2022-01-18 15:21:33,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:33,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:33,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:33,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:33,180 INFO L87 Difference]: Start difference. First operand 302 states and 899 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:33,686 INFO L93 Difference]: Finished difference Result 453 states and 1265 transitions. [2022-01-18 15:21:33,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:21:33,686 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:33,687 INFO L225 Difference]: With dead ends: 453 [2022-01-18 15:21:33,687 INFO L226 Difference]: Without dead ends: 453 [2022-01-18 15:21:33,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:21:33,687 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 179 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:33,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 175 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-18 15:21:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 295. [2022-01-18 15:21:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.996598639455782) internal successors, (881), 294 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 881 transitions. [2022-01-18 15:21:33,691 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 881 transitions. Word has length 20 [2022-01-18 15:21:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:33,691 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 881 transitions. [2022-01-18 15:21:33,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 881 transitions. [2022-01-18 15:21:33,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:33,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:33,691 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:33,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:33,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2022-01-18 15:21:33,892 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:33,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:33,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1288954686, now seen corresponding path program 397 times [2022-01-18 15:21:33,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:33,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789326991] [2022-01-18 15:21:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:33,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:34,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:34,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789326991] [2022-01-18 15:21:34,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789326991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:34,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769052649] [2022-01-18 15:21:34,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:21:34,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:34,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:34,005 INFO L229 MonitoredProcess]: Starting monitored process 398 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:34,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-01-18 15:21:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:34,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:34,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:34,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:21:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:34,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:34,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:34,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:34,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769052649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:34,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:34,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:21:34,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602805136] [2022-01-18 15:21:34,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:34,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:34,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:34,746 INFO L87 Difference]: Start difference. First operand 295 states and 881 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:35,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:35,232 INFO L93 Difference]: Finished difference Result 420 states and 1188 transitions. [2022-01-18 15:21:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:21:35,232 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:35,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:35,233 INFO L225 Difference]: With dead ends: 420 [2022-01-18 15:21:35,233 INFO L226 Difference]: Without dead ends: 420 [2022-01-18 15:21:35,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:21:35,233 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 133 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:35,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 173 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:35,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-18 15:21:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 292. [2022-01-18 15:21:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9759450171821307) internal successors, (866), 291 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 866 transitions. [2022-01-18 15:21:35,237 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 866 transitions. Word has length 20 [2022-01-18 15:21:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:35,237 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 866 transitions. [2022-01-18 15:21:35,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 866 transitions. [2022-01-18 15:21:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:35,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:35,237 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:35,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Ended with exit code 0 [2022-01-18 15:21:35,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2022-01-18 15:21:35,438 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:35,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:35,438 INFO L85 PathProgramCache]: Analyzing trace with hash -308501554, now seen corresponding path program 398 times [2022-01-18 15:21:35,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:35,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863115827] [2022-01-18 15:21:35,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:35,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:35,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:35,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863115827] [2022-01-18 15:21:35,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863115827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:35,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683901371] [2022-01-18 15:21:35,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:21:35,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:35,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:35,518 INFO L229 MonitoredProcess]: Starting monitored process 399 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:35,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-01-18 15:21:35,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:35,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:35,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:35,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:35,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 83 [2022-01-18 15:21:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:36,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:36,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:36,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:36,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683901371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:36,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:36,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:21:36,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684473260] [2022-01-18 15:21:36,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:36,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:21:36,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:36,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:21:36,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:21:36,279 INFO L87 Difference]: Start difference. First operand 292 states and 866 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:36,741 INFO L93 Difference]: Finished difference Result 424 states and 1191 transitions. [2022-01-18 15:21:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:21:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:36,742 INFO L225 Difference]: With dead ends: 424 [2022-01-18 15:21:36,742 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 15:21:36,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:21:36,742 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:36,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 221 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 15:21:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 302. [2022-01-18 15:21:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9667774086378738) internal successors, (893), 301 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:36,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 893 transitions. [2022-01-18 15:21:36,746 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 893 transitions. Word has length 20 [2022-01-18 15:21:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:36,746 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 893 transitions. [2022-01-18 15:21:36,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 893 transitions. [2022-01-18 15:21:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:36,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:36,746 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:36,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-01-18 15:21:36,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-01-18 15:21:36,947 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:36,947 INFO L85 PathProgramCache]: Analyzing trace with hash -284601640, now seen corresponding path program 399 times [2022-01-18 15:21:36,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:36,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371327641] [2022-01-18 15:21:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:36,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:37,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:37,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371327641] [2022-01-18 15:21:37,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371327641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:37,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26575556] [2022-01-18 15:21:37,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:21:37,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:37,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:37,061 INFO L229 MonitoredProcess]: Starting monitored process 400 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:37,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-01-18 15:21:37,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:21:37,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:37,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:37,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:37,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 83 [2022-01-18 15:21:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:37,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:37,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:37,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:37,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26575556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:37,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:37,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:21:37,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242443168] [2022-01-18 15:21:37,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:37,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:37,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:37,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:37,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:37,836 INFO L87 Difference]: Start difference. First operand 302 states and 893 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:38,332 INFO L93 Difference]: Finished difference Result 401 states and 1152 transitions. [2022-01-18 15:21:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:21:38,332 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:38,333 INFO L225 Difference]: With dead ends: 401 [2022-01-18 15:21:38,333 INFO L226 Difference]: Without dead ends: 401 [2022-01-18 15:21:38,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:21:38,333 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:38,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 215 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-18 15:21:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 291. [2022-01-18 15:21:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2022-01-18 15:21:38,337 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2022-01-18 15:21:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:38,337 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2022-01-18 15:21:38,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2022-01-18 15:21:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:38,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:38,337 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:38,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Ended with exit code 0 [2022-01-18 15:21:38,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2022-01-18 15:21:38,538 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1133139778, now seen corresponding path program 400 times [2022-01-18 15:21:38,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:38,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408140356] [2022-01-18 15:21:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:38,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:38,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408140356] [2022-01-18 15:21:38,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408140356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599705783] [2022-01-18 15:21:38,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:21:38,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:38,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:38,666 INFO L229 MonitoredProcess]: Starting monitored process 401 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:38,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-01-18 15:21:38,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:21:38,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:38,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:38,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:39,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:21:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:39,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:39,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:39,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:39,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599705783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:39,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:39,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:39,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031836531] [2022-01-18 15:21:39,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:39,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:39,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:39,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:39,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:39,372 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:39,810 INFO L93 Difference]: Finished difference Result 341 states and 989 transitions. [2022-01-18 15:21:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:39,810 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:39,811 INFO L225 Difference]: With dead ends: 341 [2022-01-18 15:21:39,811 INFO L226 Difference]: Without dead ends: 329 [2022-01-18 15:21:39,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:21:39,811 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:39,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 137 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-18 15:21:39,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 293. [2022-01-18 15:21:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.9657534246575343) internal successors, (866), 292 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 866 transitions. [2022-01-18 15:21:39,814 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 866 transitions. Word has length 20 [2022-01-18 15:21:39,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:39,814 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 866 transitions. [2022-01-18 15:21:39,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:39,814 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 866 transitions. [2022-01-18 15:21:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:39,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:39,815 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:39,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Ended with exit code 0 [2022-01-18 15:21:40,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2022-01-18 15:21:40,015 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:40,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:40,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1874037112, now seen corresponding path program 401 times [2022-01-18 15:21:40,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:40,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468533602] [2022-01-18 15:21:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:40,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:40,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468533602] [2022-01-18 15:21:40,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468533602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241169407] [2022-01-18 15:21:40,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:21:40,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:40,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:40,121 INFO L229 MonitoredProcess]: Starting monitored process 402 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:40,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-01-18 15:21:40,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:40,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:40,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:40,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:40,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:21:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:40,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:40,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:40,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:40,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241169407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:40,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:40,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:40,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559562815] [2022-01-18 15:21:40,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:40,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:40,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:40,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:40,839 INFO L87 Difference]: Start difference. First operand 293 states and 866 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:41,327 INFO L93 Difference]: Finished difference Result 366 states and 1041 transitions. [2022-01-18 15:21:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:21:41,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:41,328 INFO L225 Difference]: With dead ends: 366 [2022-01-18 15:21:41,328 INFO L226 Difference]: Without dead ends: 360 [2022-01-18 15:21:41,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:21:41,328 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 91 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:41,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 213 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-18 15:21:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 303. [2022-01-18 15:21:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.956953642384106) internal successors, (893), 302 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 893 transitions. [2022-01-18 15:21:41,331 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 893 transitions. Word has length 20 [2022-01-18 15:21:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:41,331 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 893 transitions. [2022-01-18 15:21:41,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 893 transitions. [2022-01-18 15:21:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:41,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:41,332 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:41,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:41,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,402 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:41,532 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:41,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:41,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1897937026, now seen corresponding path program 402 times [2022-01-18 15:21:41,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:41,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551208340] [2022-01-18 15:21:41,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:41,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:41,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:41,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551208340] [2022-01-18 15:21:41,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551208340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:41,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013509115] [2022-01-18 15:21:41,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:21:41,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:41,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:41,658 INFO L229 MonitoredProcess]: Starting monitored process 403 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:41,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-01-18 15:21:41,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:21:41,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:41,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:41,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:42,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:21:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:42,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:42,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:42,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:42,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013509115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:42,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:42,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:21:42,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720163442] [2022-01-18 15:21:42,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:42,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:42,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:42,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:42,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:42,394 INFO L87 Difference]: Start difference. First operand 303 states and 893 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:42,797 INFO L93 Difference]: Finished difference Result 337 states and 987 transitions. [2022-01-18 15:21:42,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:42,798 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:42,798 INFO L225 Difference]: With dead ends: 337 [2022-01-18 15:21:42,798 INFO L226 Difference]: Without dead ends: 337 [2022-01-18 15:21:42,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:21:42,798 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:42,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 174 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-18 15:21:42,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 290. [2022-01-18 15:21:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.961937716262976) internal successors, (856), 289 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:42,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2022-01-18 15:21:42,801 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2022-01-18 15:21:42,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:42,801 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2022-01-18 15:21:42,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:42,802 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2022-01-18 15:21:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:42,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:42,802 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:42,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:43,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2022-01-18 15:21:43,002 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:43,003 INFO L85 PathProgramCache]: Analyzing trace with hash 634272802, now seen corresponding path program 403 times [2022-01-18 15:21:43,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:43,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975719405] [2022-01-18 15:21:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:43,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:43,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:43,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975719405] [2022-01-18 15:21:43,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975719405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:43,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734341991] [2022-01-18 15:21:43,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:21:43,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:43,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:43,096 INFO L229 MonitoredProcess]: Starting monitored process 404 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:43,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-01-18 15:21:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:43,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:43,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:43,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:21:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:43,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:43,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:43,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:21:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:43,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734341991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:43,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:43,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:21:43,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520683596] [2022-01-18 15:21:43,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:43,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:43,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:43,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:43,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:43,789 INFO L87 Difference]: Start difference. First operand 290 states and 856 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:44,153 INFO L93 Difference]: Finished difference Result 414 states and 1189 transitions. [2022-01-18 15:21:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:44,154 INFO L225 Difference]: With dead ends: 414 [2022-01-18 15:21:44,154 INFO L226 Difference]: Without dead ends: 414 [2022-01-18 15:21:44,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:21:44,154 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 148 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:44,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 171 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-18 15:21:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 300. [2022-01-18 15:21:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.0133779264214047) internal successors, (901), 299 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 901 transitions. [2022-01-18 15:21:44,158 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 901 transitions. Word has length 20 [2022-01-18 15:21:44,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:44,158 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 901 transitions. [2022-01-18 15:21:44,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 901 transitions. [2022-01-18 15:21:44,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:44,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:44,158 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:44,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:44,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2022-01-18 15:21:44,359 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:44,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:44,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1516350236, now seen corresponding path program 404 times [2022-01-18 15:21:44,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:44,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490835242] [2022-01-18 15:21:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:44,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:44,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:44,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490835242] [2022-01-18 15:21:44,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490835242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:44,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829469587] [2022-01-18 15:21:44,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:21:44,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:44,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:44,454 INFO L229 MonitoredProcess]: Starting monitored process 405 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:44,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-01-18 15:21:44,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:44,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:44,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:44,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:44,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:21:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:44,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:45,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:45,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:21:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:45,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829469587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:45,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:45,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:45,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801488535] [2022-01-18 15:21:45,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:45,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:45,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:45,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:45,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:45,125 INFO L87 Difference]: Start difference. First operand 300 states and 901 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:45,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:45,526 INFO L93 Difference]: Finished difference Result 443 states and 1235 transitions. [2022-01-18 15:21:45,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:21:45,527 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:45,527 INFO L225 Difference]: With dead ends: 443 [2022-01-18 15:21:45,527 INFO L226 Difference]: Without dead ends: 437 [2022-01-18 15:21:45,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:21:45,528 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 151 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:45,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 202 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:45,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-01-18 15:21:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 303. [2022-01-18 15:21:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9900662251655628) internal successors, (903), 302 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2022-01-18 15:21:45,531 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2022-01-18 15:21:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:45,531 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2022-01-18 15:21:45,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2022-01-18 15:21:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:45,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:45,532 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:45,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Ended with exit code 0 [2022-01-18 15:21:45,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,405 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:45,732 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:45,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:45,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1375170136, now seen corresponding path program 405 times [2022-01-18 15:21:45,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:45,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755971807] [2022-01-18 15:21:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:45,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:45,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:45,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755971807] [2022-01-18 15:21:45,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755971807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:45,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965213488] [2022-01-18 15:21:45,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:21:45,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:45,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:45,833 INFO L229 MonitoredProcess]: Starting monitored process 406 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:45,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-01-18 15:21:46,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:21:46,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:46,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:46,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:46,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:21:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:46,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:46,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:46,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:21:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:46,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965213488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:46,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:46,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:21:46,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143229374] [2022-01-18 15:21:46,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:46,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:46,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:46,542 INFO L87 Difference]: Start difference. First operand 303 states and 903 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:47,016 INFO L93 Difference]: Finished difference Result 472 states and 1332 transitions. [2022-01-18 15:21:47,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:21:47,016 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:47,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:47,017 INFO L225 Difference]: With dead ends: 472 [2022-01-18 15:21:47,017 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 15:21:47,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:21:47,017 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:47,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 233 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:47,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 15:21:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 306. [2022-01-18 15:21:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0098360655737704) internal successors, (918), 305 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 918 transitions. [2022-01-18 15:21:47,021 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 918 transitions. Word has length 20 [2022-01-18 15:21:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:47,021 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 918 transitions. [2022-01-18 15:21:47,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 918 transitions. [2022-01-18 15:21:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:47,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:47,021 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:47,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Ended with exit code 0 [2022-01-18 15:21:47,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2022-01-18 15:21:47,222 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:47,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:47,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1925421540, now seen corresponding path program 406 times [2022-01-18 15:21:47,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:47,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832135630] [2022-01-18 15:21:47,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:47,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:47,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:47,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832135630] [2022-01-18 15:21:47,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832135630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:47,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183497505] [2022-01-18 15:21:47,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:21:47,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:47,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:47,329 INFO L229 MonitoredProcess]: Starting monitored process 407 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:47,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-01-18 15:21:47,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:21:47,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:47,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:47,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:47,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:21:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:47,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:47,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:47,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:21:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:48,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183497505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:48,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:48,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:21:48,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142351263] [2022-01-18 15:21:48,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:48,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:48,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:48,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:48,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:48,036 INFO L87 Difference]: Start difference. First operand 306 states and 918 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:48,561 INFO L93 Difference]: Finished difference Result 468 states and 1321 transitions. [2022-01-18 15:21:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:21:48,562 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:48,562 INFO L225 Difference]: With dead ends: 468 [2022-01-18 15:21:48,562 INFO L226 Difference]: Without dead ends: 468 [2022-01-18 15:21:48,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:21:48,562 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 158 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:48,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 265 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:21:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-18 15:21:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 303. [2022-01-18 15:21:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9900662251655628) internal successors, (903), 302 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2022-01-18 15:21:48,566 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2022-01-18 15:21:48,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:48,566 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2022-01-18 15:21:48,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:48,566 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2022-01-18 15:21:48,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:48,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:48,567 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:48,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Ended with exit code 0 [2022-01-18 15:21:48,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,407 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:48,767 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:48,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash -944968408, now seen corresponding path program 407 times [2022-01-18 15:21:48,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:48,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584580505] [2022-01-18 15:21:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:48,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:48,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:48,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584580505] [2022-01-18 15:21:48,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584580505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:48,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523026583] [2022-01-18 15:21:48,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:21:48,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:48,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:48,845 INFO L229 MonitoredProcess]: Starting monitored process 408 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:48,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-01-18 15:21:49,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:21:49,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:49,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:49,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:49,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:21:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:49,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:49,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:49,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:21:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:49,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523026583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:49,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:49,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:21:49,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136258842] [2022-01-18 15:21:49,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:49,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:21:49,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:49,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:21:49,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:21:49,478 INFO L87 Difference]: Start difference. First operand 303 states and 903 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:49,835 INFO L93 Difference]: Finished difference Result 460 states and 1284 transitions. [2022-01-18 15:21:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:21:49,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:49,836 INFO L225 Difference]: With dead ends: 460 [2022-01-18 15:21:49,836 INFO L226 Difference]: Without dead ends: 454 [2022-01-18 15:21:49,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:21:49,836 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:49,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 186 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:49,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-18 15:21:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 307. [2022-01-18 15:21:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.996732026143791) internal successors, (917), 306 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 917 transitions. [2022-01-18 15:21:49,840 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 917 transitions. Word has length 20 [2022-01-18 15:21:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:49,840 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 917 transitions. [2022-01-18 15:21:49,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:49,840 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 917 transitions. [2022-01-18 15:21:49,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:49,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:49,840 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:49,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Ended with exit code 0 [2022-01-18 15:21:50,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2022-01-18 15:21:50,041 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:50,041 INFO L85 PathProgramCache]: Analyzing trace with hash -921068494, now seen corresponding path program 408 times [2022-01-18 15:21:50,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:50,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008827216] [2022-01-18 15:21:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:50,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:50,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:50,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008827216] [2022-01-18 15:21:50,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008827216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:50,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321987366] [2022-01-18 15:21:50,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:21:50,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:50,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:50,134 INFO L229 MonitoredProcess]: Starting monitored process 409 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:50,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-01-18 15:21:50,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:21:50,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:50,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:50,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:50,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:21:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:50,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:50,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:50,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:21:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:50,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321987366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:50,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:50,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:21:50,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617605374] [2022-01-18 15:21:50,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:50,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:21:50,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:50,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:21:50,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:50,811 INFO L87 Difference]: Start difference. First operand 307 states and 917 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:51,228 INFO L93 Difference]: Finished difference Result 466 states and 1305 transitions. [2022-01-18 15:21:51,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:21:51,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:51,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:51,229 INFO L225 Difference]: With dead ends: 466 [2022-01-18 15:21:51,229 INFO L226 Difference]: Without dead ends: 466 [2022-01-18 15:21:51,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:21:51,236 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 135 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:51,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 254 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-18 15:21:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 304. [2022-01-18 15:21:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9933993399339935) internal successors, (907), 303 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 907 transitions. [2022-01-18 15:21:51,240 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 907 transitions. Word has length 20 [2022-01-18 15:21:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:51,240 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 907 transitions. [2022-01-18 15:21:51,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 907 transitions. [2022-01-18 15:21:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:51,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:51,240 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:51,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:51,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,409 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:51,441 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:51,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:51,442 INFO L85 PathProgramCache]: Analyzing trace with hash 107712958, now seen corresponding path program 409 times [2022-01-18 15:21:51,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:51,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021858642] [2022-01-18 15:21:51,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:51,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:51,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:51,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021858642] [2022-01-18 15:21:51,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021858642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:51,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871819654] [2022-01-18 15:21:51,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:21:51,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:51,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:51,533 INFO L229 MonitoredProcess]: Starting monitored process 410 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:51,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-01-18 15:21:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:51,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:51,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:21:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:51,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:52,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:52,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:21:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:52,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871819654] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:52,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:52,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:21:52,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421812392] [2022-01-18 15:21:52,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:52,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:52,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:52,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:52,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:52,183 INFO L87 Difference]: Start difference. First operand 304 states and 907 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:52,494 INFO L93 Difference]: Finished difference Result 396 states and 1150 transitions. [2022-01-18 15:21:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:52,494 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:52,494 INFO L225 Difference]: With dead ends: 396 [2022-01-18 15:21:52,494 INFO L226 Difference]: Without dead ends: 396 [2022-01-18 15:21:52,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:21:52,495 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:52,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 157 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-01-18 15:21:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 305. [2022-01-18 15:21:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9901315789473686) internal successors, (909), 304 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 909 transitions. [2022-01-18 15:21:52,498 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 909 transitions. Word has length 20 [2022-01-18 15:21:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:52,498 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 909 transitions. [2022-01-18 15:21:52,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 909 transitions. [2022-01-18 15:21:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:52,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:52,499 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:52,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Ended with exit code 0 [2022-01-18 15:21:52,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2022-01-18 15:21:52,699 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:52,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1102088578, now seen corresponding path program 410 times [2022-01-18 15:21:52,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:52,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744662647] [2022-01-18 15:21:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:52,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:52,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:52,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744662647] [2022-01-18 15:21:52,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744662647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:52,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230600298] [2022-01-18 15:21:52,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:21:52,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:52,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:52,783 INFO L229 MonitoredProcess]: Starting monitored process 411 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:52,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-01-18 15:21:53,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:53,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:53,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:53,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:53,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:21:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:53,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:53,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:53,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:21:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:53,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230600298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:53,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:53,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:21:53,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963761792] [2022-01-18 15:21:53,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:53,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:21:53,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:53,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:21:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:53,440 INFO L87 Difference]: Start difference. First operand 305 states and 909 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:53,890 INFO L93 Difference]: Finished difference Result 417 states and 1188 transitions. [2022-01-18 15:21:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:21:53,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:53,891 INFO L225 Difference]: With dead ends: 417 [2022-01-18 15:21:53,891 INFO L226 Difference]: Without dead ends: 417 [2022-01-18 15:21:53,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:21:53,891 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 114 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:53,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 259 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:21:53,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-01-18 15:21:53,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 294. [2022-01-18 15:21:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9761092150170647) internal successors, (872), 293 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2022-01-18 15:21:53,895 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2022-01-18 15:21:53,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:53,895 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2022-01-18 15:21:53,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2022-01-18 15:21:53,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:53,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:53,895 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:53,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Ended with exit code 0 [2022-01-18 15:21:54,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2022-01-18 15:21:54,096 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:54,096 INFO L85 PathProgramCache]: Analyzing trace with hash 806661396, now seen corresponding path program 411 times [2022-01-18 15:21:54,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:54,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124038005] [2022-01-18 15:21:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:54,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:54,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:54,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124038005] [2022-01-18 15:21:54,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124038005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:54,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587697556] [2022-01-18 15:21:54,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:21:54,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:54,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:54,179 INFO L229 MonitoredProcess]: Starting monitored process 412 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:54,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-01-18 15:21:54,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:21:54,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:54,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:54,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:54,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:54,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:54,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:21:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:54,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587697556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:54,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:54,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:21:54,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226058779] [2022-01-18 15:21:54,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:54,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:21:54,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:54,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:21:54,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:54,824 INFO L87 Difference]: Start difference. First operand 294 states and 872 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:55,014 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2022-01-18 15:21:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:55,015 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:55,015 INFO L225 Difference]: With dead ends: 339 [2022-01-18 15:21:55,015 INFO L226 Difference]: Without dead ends: 339 [2022-01-18 15:21:55,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:21:55,016 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:55,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 110 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-18 15:21:55,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 291. [2022-01-18 15:21:55,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9655172413793105) internal successors, (860), 290 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:55,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2022-01-18 15:21:55,019 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 20 [2022-01-18 15:21:55,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:55,019 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2022-01-18 15:21:55,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2022-01-18 15:21:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:55,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:55,019 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:55,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Ended with exit code 0 [2022-01-18 15:21:55,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,412 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:55,231 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:55,231 INFO L85 PathProgramCache]: Analyzing trace with hash -29886920, now seen corresponding path program 412 times [2022-01-18 15:21:55,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:55,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703080748] [2022-01-18 15:21:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:55,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:55,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:55,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703080748] [2022-01-18 15:21:55,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703080748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:55,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960520969] [2022-01-18 15:21:55,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:21:55,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:55,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:55,319 INFO L229 MonitoredProcess]: Starting monitored process 413 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:55,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-01-18 15:21:55,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:21:55,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:55,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:55,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:55,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:21:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:55,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:55,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:55,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:21:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:55,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960520969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:55,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:55,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:21:55,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41432833] [2022-01-18 15:21:55,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:55,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:21:55,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:55,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:21:55,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:21:55,972 INFO L87 Difference]: Start difference. First operand 291 states and 860 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:56,279 INFO L93 Difference]: Finished difference Result 384 states and 1089 transitions. [2022-01-18 15:21:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:56,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:56,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:56,280 INFO L225 Difference]: With dead ends: 384 [2022-01-18 15:21:56,280 INFO L226 Difference]: Without dead ends: 378 [2022-01-18 15:21:56,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:21:56,280 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:56,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 233 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-18 15:21:56,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 305. [2022-01-18 15:21:56,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9572368421052633) internal successors, (899), 304 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 899 transitions. [2022-01-18 15:21:56,283 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 899 transitions. Word has length 20 [2022-01-18 15:21:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:56,283 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 899 transitions. [2022-01-18 15:21:56,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 899 transitions. [2022-01-18 15:21:56,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:56,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:56,284 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:56,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Ended with exit code 0 [2022-01-18 15:21:56,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2022-01-18 15:21:56,484 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:56,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:56,485 INFO L85 PathProgramCache]: Analyzing trace with hash -5987006, now seen corresponding path program 413 times [2022-01-18 15:21:56,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:56,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126700972] [2022-01-18 15:21:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:56,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:56,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:56,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126700972] [2022-01-18 15:21:56,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126700972] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:56,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719733837] [2022-01-18 15:21:56,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:21:56,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:56,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:56,575 INFO L229 MonitoredProcess]: Starting monitored process 414 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:56,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-01-18 15:21:56,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:21:56,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:56,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:56,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:56,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:21:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:57,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:57,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:57,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:21:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:57,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719733837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:57,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:57,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:21:57,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035541349] [2022-01-18 15:21:57,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:57,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:57,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:57,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:57,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:57,212 INFO L87 Difference]: Start difference. First operand 305 states and 899 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:57,547 INFO L93 Difference]: Finished difference Result 390 states and 1110 transitions. [2022-01-18 15:21:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:21:57,547 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:57,548 INFO L225 Difference]: With dead ends: 390 [2022-01-18 15:21:57,548 INFO L226 Difference]: Without dead ends: 390 [2022-01-18 15:21:57,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:21:57,548 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 99 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:57,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 264 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:57,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-18 15:21:57,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 303. [2022-01-18 15:21:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9602649006622515) internal successors, (894), 302 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 894 transitions. [2022-01-18 15:21:57,551 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 894 transitions. Word has length 20 [2022-01-18 15:21:57,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:57,551 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 894 transitions. [2022-01-18 15:21:57,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 894 transitions. [2022-01-18 15:21:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:57,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:57,552 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:57,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:57,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2022-01-18 15:21:57,752 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:57,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:57,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1477147932, now seen corresponding path program 414 times [2022-01-18 15:21:57,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:57,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094420135] [2022-01-18 15:21:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:57,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:57,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:57,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094420135] [2022-01-18 15:21:57,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094420135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:57,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169714555] [2022-01-18 15:21:57,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:21:57,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:57,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:57,865 INFO L229 MonitoredProcess]: Starting monitored process 415 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:57,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-01-18 15:21:58,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:21:58,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:58,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:58,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:58,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:58,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:58,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:21:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:58,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169714555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:58,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:58,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:21:58,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752930924] [2022-01-18 15:21:58,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:58,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:58,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:58,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:58,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:58,491 INFO L87 Difference]: Start difference. First operand 303 states and 894 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:58,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:58,761 INFO L93 Difference]: Finished difference Result 359 states and 1045 transitions. [2022-01-18 15:21:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:58,761 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:58,761 INFO L225 Difference]: With dead ends: 359 [2022-01-18 15:21:58,762 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 15:21:58,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:21:58,762 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:58,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 166 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 15:21:58,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 290. [2022-01-18 15:21:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.961937716262976) internal successors, (856), 289 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2022-01-18 15:21:58,765 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2022-01-18 15:21:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:58,765 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2022-01-18 15:21:58,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2022-01-18 15:21:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:58,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:58,765 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:58,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:58,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,415 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:58,966 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:58,966 INFO L85 PathProgramCache]: Analyzing trace with hash -564105166, now seen corresponding path program 415 times [2022-01-18 15:21:58,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:58,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123953960] [2022-01-18 15:21:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:58,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:59,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:59,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123953960] [2022-01-18 15:21:59,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123953960] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:59,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457779471] [2022-01-18 15:21:59,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:21:59,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:59,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:59,051 INFO L229 MonitoredProcess]: Starting monitored process 416 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:59,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-01-18 15:21:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:59,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:59,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:59,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:21:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:59,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:59,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:59,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:21:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:59,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457779471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:59,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:59,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:21:59,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157252354] [2022-01-18 15:21:59,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:59,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:21:59,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:59,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:21:59,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:59,655 INFO L87 Difference]: Start difference. First operand 290 states and 856 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:59,931 INFO L93 Difference]: Finished difference Result 331 states and 961 transitions. [2022-01-18 15:21:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:59,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:21:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:59,931 INFO L225 Difference]: With dead ends: 331 [2022-01-18 15:21:59,932 INFO L226 Difference]: Without dead ends: 319 [2022-01-18 15:21:59,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:21:59,932 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:59,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 119 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:21:59,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-18 15:21:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2022-01-18 15:21:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.955631399317406) internal successors, (866), 293 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2022-01-18 15:21:59,935 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2022-01-18 15:21:59,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:59,935 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2022-01-18 15:21:59,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:59,935 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2022-01-18 15:21:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:21:59,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:59,935 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:59,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:00,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2022-01-18 15:22:00,136 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:00,136 INFO L85 PathProgramCache]: Analyzing trace with hash 176792168, now seen corresponding path program 416 times [2022-01-18 15:22:00,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:00,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696177567] [2022-01-18 15:22:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:00,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:00,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:00,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696177567] [2022-01-18 15:22:00,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696177567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:00,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469542702] [2022-01-18 15:22:00,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:00,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:00,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:00,227 INFO L229 MonitoredProcess]: Starting monitored process 417 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:00,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-01-18 15:22:00,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:00,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:00,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:00,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:00,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:22:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:00,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:00,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:00,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:00,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469542702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:00,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:00,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:22:00,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512783865] [2022-01-18 15:22:00,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:00,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:00,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:00,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:00,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:00,847 INFO L87 Difference]: Start difference. First operand 294 states and 866 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:01,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:01,192 INFO L93 Difference]: Finished difference Result 356 states and 1013 transitions. [2022-01-18 15:22:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:22:01,192 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:01,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:01,193 INFO L225 Difference]: With dead ends: 356 [2022-01-18 15:22:01,193 INFO L226 Difference]: Without dead ends: 350 [2022-01-18 15:22:01,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:22:01,193 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:01,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 176 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-18 15:22:01,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 304. [2022-01-18 15:22:01,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.947194719471947) internal successors, (893), 303 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:01,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 893 transitions. [2022-01-18 15:22:01,196 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 893 transitions. Word has length 20 [2022-01-18 15:22:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:01,196 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 893 transitions. [2022-01-18 15:22:01,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 893 transitions. [2022-01-18 15:22:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:01,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:01,197 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:01,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:01,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,417 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:01,397 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:01,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:01,397 INFO L85 PathProgramCache]: Analyzing trace with hash 200692082, now seen corresponding path program 417 times [2022-01-18 15:22:01,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:01,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723696775] [2022-01-18 15:22:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:01,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:01,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:01,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723696775] [2022-01-18 15:22:01,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723696775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:01,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863545604] [2022-01-18 15:22:01,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:01,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:01,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:01,491 INFO L229 MonitoredProcess]: Starting monitored process 418 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:01,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-01-18 15:22:01,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:22:01,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:01,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:22:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:01,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:01,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:01,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:02,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863545604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:02,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:02,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:22:02,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069687735] [2022-01-18 15:22:02,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:02,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:22:02,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:02,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:22:02,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:02,118 INFO L87 Difference]: Start difference. First operand 304 states and 893 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:02,405 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2022-01-18 15:22:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:02,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:02,406 INFO L225 Difference]: With dead ends: 327 [2022-01-18 15:22:02,406 INFO L226 Difference]: Without dead ends: 327 [2022-01-18 15:22:02,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:22:02,406 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:02,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 164 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-18 15:22:02,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2022-01-18 15:22:02,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9587628865979383) internal successors, (861), 291 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2022-01-18 15:22:02,409 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2022-01-18 15:22:02,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:02,409 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2022-01-18 15:22:02,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:02,409 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2022-01-18 15:22:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:02,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:02,410 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:02,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:02,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2022-01-18 15:22:02,610 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:02,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:02,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1090665010, now seen corresponding path program 418 times [2022-01-18 15:22:02,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:02,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180267286] [2022-01-18 15:22:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:02,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:02,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180267286] [2022-01-18 15:22:02,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180267286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501572026] [2022-01-18 15:22:02,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:02,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:02,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:02,716 INFO L229 MonitoredProcess]: Starting monitored process 419 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:02,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-01-18 15:22:02,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:02,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:02,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:02,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:03,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:03,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:03,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:03,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:22:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:03,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501572026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:03,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:03,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:22:03,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237766792] [2022-01-18 15:22:03,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:03,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:03,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:03,286 INFO L87 Difference]: Start difference. First operand 292 states and 861 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:03,545 INFO L93 Difference]: Finished difference Result 362 states and 1028 transitions. [2022-01-18 15:22:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:03,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:03,545 INFO L225 Difference]: With dead ends: 362 [2022-01-18 15:22:03,545 INFO L226 Difference]: Without dead ends: 356 [2022-01-18 15:22:03,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:22:03,546 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 94 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:03,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 163 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-18 15:22:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 306. [2022-01-18 15:22:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9508196721311477) internal successors, (900), 305 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 900 transitions. [2022-01-18 15:22:03,549 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 900 transitions. Word has length 20 [2022-01-18 15:22:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:03,549 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 900 transitions. [2022-01-18 15:22:03,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 900 transitions. [2022-01-18 15:22:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:03,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:03,549 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:03,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Ended with exit code 0 [2022-01-18 15:22:03,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2022-01-18 15:22:03,750 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:03,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:03,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1066765096, now seen corresponding path program 419 times [2022-01-18 15:22:03,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:03,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340746415] [2022-01-18 15:22:03,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:03,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:03,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:03,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340746415] [2022-01-18 15:22:03,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340746415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:03,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753693033] [2022-01-18 15:22:03,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:03,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:03,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:03,836 INFO L229 MonitoredProcess]: Starting monitored process 420 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:03,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-01-18 15:22:04,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:22:04,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:04,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:04,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:04,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:04,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:04,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:04,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:22:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:04,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753693033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:04,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:04,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:22:04,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401981613] [2022-01-18 15:22:04,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:04,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:22:04,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:22:04,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:04,401 INFO L87 Difference]: Start difference. First operand 306 states and 900 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:04,647 INFO L93 Difference]: Finished difference Result 362 states and 1034 transitions. [2022-01-18 15:22:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:04,647 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:04,648 INFO L225 Difference]: With dead ends: 362 [2022-01-18 15:22:04,648 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 15:22:04,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:22:04,648 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 98 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:04,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 182 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 15:22:04,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 304. [2022-01-18 15:22:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.953795379537954) internal successors, (895), 303 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2022-01-18 15:22:04,651 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 20 [2022-01-18 15:22:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:04,651 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2022-01-18 15:22:04,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2022-01-18 15:22:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:04,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:04,652 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:04,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Ended with exit code 0 [2022-01-18 15:22:04,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2022-01-18 15:22:04,862 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash 416369842, now seen corresponding path program 420 times [2022-01-18 15:22:04,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:04,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003978490] [2022-01-18 15:22:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:04,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:04,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:04,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003978490] [2022-01-18 15:22:04,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003978490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:04,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945264917] [2022-01-18 15:22:04,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:04,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:04,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:04,932 INFO L229 MonitoredProcess]: Starting monitored process 421 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:04,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-01-18 15:22:05,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:22:05,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:05,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:05,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:05,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:05,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:05,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:22:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:05,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945264917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:05,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:05,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:22:05,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098250208] [2022-01-18 15:22:05,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:05,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:22:05,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:05,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:22:05,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:05,446 INFO L87 Difference]: Start difference. First operand 304 states and 895 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:05,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:05,629 INFO L93 Difference]: Finished difference Result 337 states and 984 transitions. [2022-01-18 15:22:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:05,629 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:05,630 INFO L225 Difference]: With dead ends: 337 [2022-01-18 15:22:05,630 INFO L226 Difference]: Without dead ends: 337 [2022-01-18 15:22:05,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:05,630 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:05,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 127 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:05,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-18 15:22:05,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 289. [2022-01-18 15:22:05,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.9583333333333335) internal successors, (852), 288 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2022-01-18 15:22:05,633 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2022-01-18 15:22:05,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:05,633 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2022-01-18 15:22:05,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2022-01-18 15:22:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:05,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:05,634 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:05,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Ended with exit code 0 [2022-01-18 15:22:05,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2022-01-18 15:22:05,834 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:05,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2109890380, now seen corresponding path program 421 times [2022-01-18 15:22:05,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:05,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642192872] [2022-01-18 15:22:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:05,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:05,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:05,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642192872] [2022-01-18 15:22:05,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642192872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:05,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994179348] [2022-01-18 15:22:05,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:05,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:05,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:05,923 INFO L229 MonitoredProcess]: Starting monitored process 422 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:05,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-01-18 15:22:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:06,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:06,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:06,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:22:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:06,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:06,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:06,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:06,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994179348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:06,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:06,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:22:06,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254566276] [2022-01-18 15:22:06,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:06,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:06,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:06,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:06,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:06,595 INFO L87 Difference]: Start difference. First operand 289 states and 852 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:06,992 INFO L93 Difference]: Finished difference Result 514 states and 1479 transitions. [2022-01-18 15:22:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:06,993 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:06,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:06,993 INFO L225 Difference]: With dead ends: 514 [2022-01-18 15:22:06,993 INFO L226 Difference]: Without dead ends: 514 [2022-01-18 15:22:06,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:22:06,994 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 186 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:06,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 204 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:06,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-18 15:22:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 301. [2022-01-18 15:22:06,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.02) internal successors, (906), 300 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 906 transitions. [2022-01-18 15:22:06,997 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 906 transitions. Word has length 20 [2022-01-18 15:22:06,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:06,998 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 906 transitions. [2022-01-18 15:22:06,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 906 transitions. [2022-01-18 15:22:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:06,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:06,998 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:07,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:07,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2022-01-18 15:22:07,198 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:07,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:07,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1302999482, now seen corresponding path program 422 times [2022-01-18 15:22:07,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:07,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345780841] [2022-01-18 15:22:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:07,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:07,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:07,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345780841] [2022-01-18 15:22:07,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345780841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:07,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193005833] [2022-01-18 15:22:07,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:07,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:07,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:07,288 INFO L229 MonitoredProcess]: Starting monitored process 423 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:07,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-01-18 15:22:07,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:07,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:07,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:07,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:07,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:22:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:07,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:07,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:07,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:07,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193005833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:07,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:07,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:22:07,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226990579] [2022-01-18 15:22:07,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:07,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:22:07,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:07,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:22:07,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:07,949 INFO L87 Difference]: Start difference. First operand 301 states and 906 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:08,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:08,372 INFO L93 Difference]: Finished difference Result 543 states and 1525 transitions. [2022-01-18 15:22:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:08,372 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:08,373 INFO L225 Difference]: With dead ends: 543 [2022-01-18 15:22:08,373 INFO L226 Difference]: Without dead ends: 537 [2022-01-18 15:22:08,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:22:08,374 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 162 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:08,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 216 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:08,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-18 15:22:08,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 304. [2022-01-18 15:22:08,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9966996699669965) internal successors, (908), 303 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2022-01-18 15:22:08,377 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2022-01-18 15:22:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:08,378 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2022-01-18 15:22:08,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2022-01-18 15:22:08,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:08,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:08,378 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:08,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Ended with exit code 0 [2022-01-18 15:22:08,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2022-01-18 15:22:08,578 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:08,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:08,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1444179582, now seen corresponding path program 423 times [2022-01-18 15:22:08,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:08,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833441239] [2022-01-18 15:22:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:08,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:08,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:08,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833441239] [2022-01-18 15:22:08,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833441239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:08,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084436642] [2022-01-18 15:22:08,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:08,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:08,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:08,675 INFO L229 MonitoredProcess]: Starting monitored process 424 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:08,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-01-18 15:22:08,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:22:08,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:08,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:08,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:09,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:22:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:09,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:09,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:09,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:09,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084436642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:09,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:09,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:22:09,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741441561] [2022-01-18 15:22:09,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:09,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:09,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:09,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:09,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:09,406 INFO L87 Difference]: Start difference. First operand 304 states and 908 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:09,977 INFO L93 Difference]: Finished difference Result 572 states and 1622 transitions. [2022-01-18 15:22:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:22:09,978 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:09,978 INFO L225 Difference]: With dead ends: 572 [2022-01-18 15:22:09,978 INFO L226 Difference]: Without dead ends: 572 [2022-01-18 15:22:09,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:22:09,979 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 195 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:09,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 262 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:22:09,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-18 15:22:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 307. [2022-01-18 15:22:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0163398692810457) internal successors, (923), 306 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 923 transitions. [2022-01-18 15:22:09,983 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 923 transitions. Word has length 20 [2022-01-18 15:22:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:09,983 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 923 transitions. [2022-01-18 15:22:09,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 923 transitions. [2022-01-18 15:22:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:09,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:09,983 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:10,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Ended with exit code 0 [2022-01-18 15:22:10,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,424 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:10,184 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash -449803962, now seen corresponding path program 424 times [2022-01-18 15:22:10,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:10,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244509803] [2022-01-18 15:22:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:10,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:10,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:10,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244509803] [2022-01-18 15:22:10,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244509803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:10,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170338196] [2022-01-18 15:22:10,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:10,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:10,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:10,268 INFO L229 MonitoredProcess]: Starting monitored process 425 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:10,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-01-18 15:22:10,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:10,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:10,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:10,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:10,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:22:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:10,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:10,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:10,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:10,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170338196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:10,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:10,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:22:10,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239193173] [2022-01-18 15:22:10,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:10,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:10,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:10,916 INFO L87 Difference]: Start difference. First operand 307 states and 923 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:11,382 INFO L93 Difference]: Finished difference Result 568 states and 1611 transitions. [2022-01-18 15:22:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:22:11,382 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:11,383 INFO L225 Difference]: With dead ends: 568 [2022-01-18 15:22:11,383 INFO L226 Difference]: Without dead ends: 568 [2022-01-18 15:22:11,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:22:11,383 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 185 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:11,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 171 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:11,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-18 15:22:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 304. [2022-01-18 15:22:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9966996699669965) internal successors, (908), 303 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2022-01-18 15:22:11,387 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2022-01-18 15:22:11,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:11,387 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2022-01-18 15:22:11,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2022-01-18 15:22:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:11,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:11,388 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:11,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:11,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,425 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:11,588 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:11,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:11,588 INFO L85 PathProgramCache]: Analyzing trace with hash 530649170, now seen corresponding path program 425 times [2022-01-18 15:22:11,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:11,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434734845] [2022-01-18 15:22:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:11,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:11,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:11,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434734845] [2022-01-18 15:22:11,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434734845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:11,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170255144] [2022-01-18 15:22:11,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:11,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:11,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:11,679 INFO L229 MonitoredProcess]: Starting monitored process 426 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:11,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-01-18 15:22:11,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:22:11,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:11,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:11,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:12,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:22:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:12,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:12,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:12,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:12,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170255144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:12,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:12,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:22:12,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414774676] [2022-01-18 15:22:12,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:12,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:22:12,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:12,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:22:12,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:12,333 INFO L87 Difference]: Start difference. First operand 304 states and 908 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:12,768 INFO L93 Difference]: Finished difference Result 560 states and 1574 transitions. [2022-01-18 15:22:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:22:12,768 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:12,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:12,769 INFO L225 Difference]: With dead ends: 560 [2022-01-18 15:22:12,769 INFO L226 Difference]: Without dead ends: 554 [2022-01-18 15:22:12,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:22:12,769 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 204 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:12,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 185 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-18 15:22:12,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 308. [2022-01-18 15:22:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.003257328990228) internal successors, (922), 307 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 922 transitions. [2022-01-18 15:22:12,773 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 922 transitions. Word has length 20 [2022-01-18 15:22:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:12,773 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 922 transitions. [2022-01-18 15:22:12,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 922 transitions. [2022-01-18 15:22:12,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:12,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:12,774 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:12,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:12,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 426 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2022-01-18 15:22:12,974 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:12,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:12,974 INFO L85 PathProgramCache]: Analyzing trace with hash 554549084, now seen corresponding path program 426 times [2022-01-18 15:22:12,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:12,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449690862] [2022-01-18 15:22:12,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:12,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:13,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:13,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449690862] [2022-01-18 15:22:13,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449690862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:13,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740034790] [2022-01-18 15:22:13,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:13,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:13,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:13,092 INFO L229 MonitoredProcess]: Starting monitored process 427 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:13,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-01-18 15:22:13,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:22:13,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:13,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:13,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:13,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:22:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:13,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:13,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:13,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:13,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740034790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:13,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:13,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:22:13,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472678116] [2022-01-18 15:22:13,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:13,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:13,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:13,790 INFO L87 Difference]: Start difference. First operand 308 states and 922 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:14,319 INFO L93 Difference]: Finished difference Result 543 states and 1556 transitions. [2022-01-18 15:22:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:22:14,319 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:14,320 INFO L225 Difference]: With dead ends: 543 [2022-01-18 15:22:14,320 INFO L226 Difference]: Without dead ends: 543 [2022-01-18 15:22:14,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:22:14,321 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 163 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:14,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 270 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-18 15:22:14,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 305. [2022-01-18 15:22:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0) internal successors, (912), 304 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2022-01-18 15:22:14,325 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2022-01-18 15:22:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:14,325 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2022-01-18 15:22:14,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2022-01-18 15:22:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:14,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:14,326 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:14,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:14,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,427 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:14,526 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:14,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:14,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1583330536, now seen corresponding path program 427 times [2022-01-18 15:22:14,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:14,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854584250] [2022-01-18 15:22:14,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:14,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:14,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:14,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854584250] [2022-01-18 15:22:14,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854584250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:14,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840529190] [2022-01-18 15:22:14,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:14,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:14,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:14,627 INFO L229 MonitoredProcess]: Starting monitored process 428 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:14,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-01-18 15:22:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:14,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:14,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:15,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:22:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:15,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:15,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:15,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:15,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840529190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:15,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:15,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:22:15,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995985148] [2022-01-18 15:22:15,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:15,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:15,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:15,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:15,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:15,288 INFO L87 Difference]: Start difference. First operand 305 states and 912 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:15,672 INFO L93 Difference]: Finished difference Result 517 states and 1509 transitions. [2022-01-18 15:22:15,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:15,672 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:15,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:15,673 INFO L225 Difference]: With dead ends: 517 [2022-01-18 15:22:15,673 INFO L226 Difference]: Without dead ends: 517 [2022-01-18 15:22:15,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:22:15,673 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 154 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:15,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 213 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:15,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-18 15:22:15,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2022-01-18 15:22:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.029032258064516) internal successors, (939), 310 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 939 transitions. [2022-01-18 15:22:15,677 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 939 transitions. Word has length 20 [2022-01-18 15:22:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:15,677 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 939 transitions. [2022-01-18 15:22:15,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 939 transitions. [2022-01-18 15:22:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:15,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:15,678 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:15,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Ended with exit code 0 [2022-01-18 15:22:15,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2022-01-18 15:22:15,878 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1717261140, now seen corresponding path program 428 times [2022-01-18 15:22:15,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:15,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538087644] [2022-01-18 15:22:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:15,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:15,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:15,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538087644] [2022-01-18 15:22:15,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538087644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:15,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765709897] [2022-01-18 15:22:15,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:15,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:15,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:15,989 INFO L229 MonitoredProcess]: Starting monitored process 429 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:15,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Waiting until timeout for monitored process [2022-01-18 15:22:16,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:16,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:16,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:22:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:16,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:16,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:16,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:16,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765709897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:16,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:16,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:22:16,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636695027] [2022-01-18 15:22:16,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:16,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:16,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:16,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:16,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:16,633 INFO L87 Difference]: Start difference. First operand 311 states and 939 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:17,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:17,080 INFO L93 Difference]: Finished difference Result 538 states and 1547 transitions. [2022-01-18 15:22:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:22:17,080 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:17,081 INFO L225 Difference]: With dead ends: 538 [2022-01-18 15:22:17,081 INFO L226 Difference]: Without dead ends: 538 [2022-01-18 15:22:17,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:22:17,081 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:17,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 201 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-18 15:22:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 308. [2022-01-18 15:22:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.009771986970684) internal successors, (924), 307 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:17,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2022-01-18 15:22:17,085 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2022-01-18 15:22:17,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:17,085 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2022-01-18 15:22:17,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2022-01-18 15:22:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:17,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:17,086 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:17,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Ended with exit code 0 [2022-01-18 15:22:17,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,429 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:17,286 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:17,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2012688322, now seen corresponding path program 429 times [2022-01-18 15:22:17,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:17,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648096377] [2022-01-18 15:22:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:17,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:17,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:17,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648096377] [2022-01-18 15:22:17,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648096377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:17,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200514416] [2022-01-18 15:22:17,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:17,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:17,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:17,373 INFO L229 MonitoredProcess]: Starting monitored process 430 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:17,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Waiting until timeout for monitored process [2022-01-18 15:22:17,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:22:17,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:17,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:17,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:17,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:17,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:18,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200514416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:18,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:18,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:22:18,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253544653] [2022-01-18 15:22:18,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:18,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:18,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:18,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:18,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:18,024 INFO L87 Difference]: Start difference. First operand 308 states and 924 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:18,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:18,354 INFO L93 Difference]: Finished difference Result 460 states and 1354 transitions. [2022-01-18 15:22:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:18,354 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:18,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:18,355 INFO L225 Difference]: With dead ends: 460 [2022-01-18 15:22:18,355 INFO L226 Difference]: Without dead ends: 460 [2022-01-18 15:22:18,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:22:18,355 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 97 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:18,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 200 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:18,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-01-18 15:22:18,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 305. [2022-01-18 15:22:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0) internal successors, (912), 304 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2022-01-18 15:22:18,359 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2022-01-18 15:22:18,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:18,359 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2022-01-18 15:22:18,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2022-01-18 15:22:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:18,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:18,360 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:18,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Ended with exit code 0 [2022-01-18 15:22:18,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2022-01-18 15:22:18,560 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1445730658, now seen corresponding path program 430 times [2022-01-18 15:22:18,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:18,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283150097] [2022-01-18 15:22:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:18,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:18,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:18,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283150097] [2022-01-18 15:22:18,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283150097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:18,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150942750] [2022-01-18 15:22:18,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:18,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:18,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:18,647 INFO L229 MonitoredProcess]: Starting monitored process 431 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:18,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Waiting until timeout for monitored process [2022-01-18 15:22:18,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:18,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:18,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:18,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:19,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:19,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:19,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:19,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:19,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150942750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:19,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:19,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:22:19,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924253053] [2022-01-18 15:22:19,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:19,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:22:19,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:19,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:22:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:19,269 INFO L87 Difference]: Start difference. First operand 305 states and 912 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:19,626 INFO L93 Difference]: Finished difference Result 499 states and 1433 transitions. [2022-01-18 15:22:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:19,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:19,627 INFO L225 Difference]: With dead ends: 499 [2022-01-18 15:22:19,627 INFO L226 Difference]: Without dead ends: 493 [2022-01-18 15:22:19,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:22:19,628 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 139 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:19,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 250 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-18 15:22:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 313. [2022-01-18 15:22:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0064102564102564) internal successors, (938), 312 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 938 transitions. [2022-01-18 15:22:19,631 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 938 transitions. Word has length 20 [2022-01-18 15:22:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:19,631 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 938 transitions. [2022-01-18 15:22:19,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 938 transitions. [2022-01-18 15:22:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:19,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:19,632 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:19,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Ended with exit code 0 [2022-01-18 15:22:19,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2022-01-18 15:22:19,832 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:19,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1469630572, now seen corresponding path program 431 times [2022-01-18 15:22:19,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:19,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125824433] [2022-01-18 15:22:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:19,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:19,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:19,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125824433] [2022-01-18 15:22:19,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125824433] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:19,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869421868] [2022-01-18 15:22:19,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:19,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:19,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:19,912 INFO L229 MonitoredProcess]: Starting monitored process 432 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:19,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Waiting until timeout for monitored process [2022-01-18 15:22:20,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:22:20,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:20,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:20,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:20,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:20,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:20,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:20,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:20,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869421868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:20,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:20,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:22:20,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813857860] [2022-01-18 15:22:20,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:20,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:20,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:20,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:20,531 INFO L87 Difference]: Start difference. First operand 313 states and 938 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:20,832 INFO L93 Difference]: Finished difference Result 505 states and 1454 transitions. [2022-01-18 15:22:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:20,832 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:20,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:20,833 INFO L225 Difference]: With dead ends: 505 [2022-01-18 15:22:20,833 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 15:22:20,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:22:20,833 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 106 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:20,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 207 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:20,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 15:22:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 309. [2022-01-18 15:22:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0) internal successors, (924), 308 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2022-01-18 15:22:20,837 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2022-01-18 15:22:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:20,837 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2022-01-18 15:22:20,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:20,837 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2022-01-18 15:22:20,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:20,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:20,838 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:20,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Ended with exit code 0 [2022-01-18 15:22:21,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2022-01-18 15:22:21,038 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:21,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1342201786, now seen corresponding path program 432 times [2022-01-18 15:22:21,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:21,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534991210] [2022-01-18 15:22:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:21,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:21,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:21,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534991210] [2022-01-18 15:22:21,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534991210] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:21,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102064185] [2022-01-18 15:22:21,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:21,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:21,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:21,118 INFO L229 MonitoredProcess]: Starting monitored process 433 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:21,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Waiting until timeout for monitored process [2022-01-18 15:22:21,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:22:21,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:21,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:21,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:21,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:21,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:21,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:21,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102064185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:21,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:21,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:22:21,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059075223] [2022-01-18 15:22:21,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:21,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:21,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:21,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:21,709 INFO L87 Difference]: Start difference. First operand 309 states and 924 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:21,941 INFO L93 Difference]: Finished difference Result 480 states and 1404 transitions. [2022-01-18 15:22:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:21,941 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:21,942 INFO L225 Difference]: With dead ends: 480 [2022-01-18 15:22:21,942 INFO L226 Difference]: Without dead ends: 480 [2022-01-18 15:22:21,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:22:21,942 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:21,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 146 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-18 15:22:21,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 306. [2022-01-18 15:22:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2022-01-18 15:22:21,945 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 20 [2022-01-18 15:22:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:21,946 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2022-01-18 15:22:21,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2022-01-18 15:22:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:21,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:21,946 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:21,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Ended with exit code 0 [2022-01-18 15:22:22,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2022-01-18 15:22:22,146 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:22,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:22,147 INFO L85 PathProgramCache]: Analyzing trace with hash 522552446, now seen corresponding path program 433 times [2022-01-18 15:22:22,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:22,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633671027] [2022-01-18 15:22:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:22,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:22,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:22,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633671027] [2022-01-18 15:22:22,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633671027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:22,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892021767] [2022-01-18 15:22:22,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:22,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:22,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:22,230 INFO L229 MonitoredProcess]: Starting monitored process 434 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:22,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Waiting until timeout for monitored process [2022-01-18 15:22:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:22,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:22,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:22,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-01-18 15:22:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:22,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:22,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:22,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:22,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892021767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:22,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:22,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:22:22,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180858241] [2022-01-18 15:22:22,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:22,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:22,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:22,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:22,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:22,930 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:23,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:23,311 INFO L93 Difference]: Finished difference Result 504 states and 1465 transitions. [2022-01-18 15:22:23,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:23,311 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:23,312 INFO L225 Difference]: With dead ends: 504 [2022-01-18 15:22:23,312 INFO L226 Difference]: Without dead ends: 504 [2022-01-18 15:22:23,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:22:23,312 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 153 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:23,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 201 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-18 15:22:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 309. [2022-01-18 15:22:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0) internal successors, (924), 308 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2022-01-18 15:22:23,316 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2022-01-18 15:22:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:23,316 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2022-01-18 15:22:23,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2022-01-18 15:22:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:23,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:23,317 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:23,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Ended with exit code 0 [2022-01-18 15:22:23,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,434 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:23,517 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:23,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1516928066, now seen corresponding path program 434 times [2022-01-18 15:22:23,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:23,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287822941] [2022-01-18 15:22:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:23,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:23,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:23,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287822941] [2022-01-18 15:22:23,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287822941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:23,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132814481] [2022-01-18 15:22:23,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:23,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:23,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:23,623 INFO L229 MonitoredProcess]: Starting monitored process 435 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:23,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Waiting until timeout for monitored process [2022-01-18 15:22:23,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:23,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:23,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:23,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:24,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:22:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:24,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:24,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:24,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:24,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132814481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:24,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:24,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 15:22:24,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899358306] [2022-01-18 15:22:24,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:24,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:24,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:24,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:24,281 INFO L87 Difference]: Start difference. First operand 309 states and 924 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:24,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:24,688 INFO L93 Difference]: Finished difference Result 539 states and 1540 transitions. [2022-01-18 15:22:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:22:24,688 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:24,689 INFO L225 Difference]: With dead ends: 539 [2022-01-18 15:22:24,689 INFO L226 Difference]: Without dead ends: 539 [2022-01-18 15:22:24,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:22:24,689 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 185 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:24,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 233 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:24,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-18 15:22:24,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 306. [2022-01-18 15:22:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.980327868852459) internal successors, (909), 305 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 909 transitions. [2022-01-18 15:22:24,693 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 909 transitions. Word has length 20 [2022-01-18 15:22:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:24,693 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 909 transitions. [2022-01-18 15:22:24,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 909 transitions. [2022-01-18 15:22:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:24,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:24,694 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:24,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:24,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2022-01-18 15:22:24,894 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:24,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1221500884, now seen corresponding path program 435 times [2022-01-18 15:22:24,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:24,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353393566] [2022-01-18 15:22:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:24,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:24,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:24,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353393566] [2022-01-18 15:22:24,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353393566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:24,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222882647] [2022-01-18 15:22:24,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:24,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:24,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:24,971 INFO L229 MonitoredProcess]: Starting monitored process 436 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:24,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Waiting until timeout for monitored process [2022-01-18 15:22:25,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:22:25,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:25,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:25,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:25,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:25,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:25,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:25,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222882647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:25,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:25,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:22:25,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679757786] [2022-01-18 15:22:25,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:25,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:25,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:25,583 INFO L87 Difference]: Start difference. First operand 306 states and 909 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:25,763 INFO L93 Difference]: Finished difference Result 451 states and 1318 transitions. [2022-01-18 15:22:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:25,764 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:25,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:25,764 INFO L225 Difference]: With dead ends: 451 [2022-01-18 15:22:25,764 INFO L226 Difference]: Without dead ends: 451 [2022-01-18 15:22:25,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:22:25,765 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:25,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 136 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-18 15:22:25,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 293. [2022-01-18 15:22:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.9726027397260273) internal successors, (868), 292 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 868 transitions. [2022-01-18 15:22:25,768 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 868 transitions. Word has length 20 [2022-01-18 15:22:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:25,768 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 868 transitions. [2022-01-18 15:22:25,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:25,768 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 868 transitions. [2022-01-18 15:22:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:25,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:25,768 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:25,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Ended with exit code 0 [2022-01-18 15:22:25,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 436 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2022-01-18 15:22:25,969 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash 459413830, now seen corresponding path program 436 times [2022-01-18 15:22:25,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:25,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278462624] [2022-01-18 15:22:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:25,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:26,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:26,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278462624] [2022-01-18 15:22:26,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278462624] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:26,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638746033] [2022-01-18 15:22:26,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:26,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:26,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:26,042 INFO L229 MonitoredProcess]: Starting monitored process 437 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:26,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Waiting until timeout for monitored process [2022-01-18 15:22:26,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:26,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:26,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:26,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:26,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:26,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:26,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:26,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638746033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:26,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:26,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:22:26,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845120502] [2022-01-18 15:22:26,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:26,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:22:26,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:22:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:26,649 INFO L87 Difference]: Start difference. First operand 293 states and 868 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:26,946 INFO L93 Difference]: Finished difference Result 474 states and 1360 transitions. [2022-01-18 15:22:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:26,947 INFO L225 Difference]: With dead ends: 474 [2022-01-18 15:22:26,947 INFO L226 Difference]: Without dead ends: 474 [2022-01-18 15:22:26,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:22:26,947 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 112 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:26,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 223 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-18 15:22:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 290. [2022-01-18 15:22:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.961937716262976) internal successors, (856), 289 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2022-01-18 15:22:26,951 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2022-01-18 15:22:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:26,951 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2022-01-18 15:22:26,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2022-01-18 15:22:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:26,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:26,951 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:26,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:27,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2022-01-18 15:22:27,152 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash -675825522, now seen corresponding path program 437 times [2022-01-18 15:22:27,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:27,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599956297] [2022-01-18 15:22:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:27,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:27,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:27,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599956297] [2022-01-18 15:22:27,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599956297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:27,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703812192] [2022-01-18 15:22:27,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:27,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:27,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:27,231 INFO L229 MonitoredProcess]: Starting monitored process 438 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:27,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Waiting until timeout for monitored process [2022-01-18 15:22:27,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:22:27,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:27,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:27,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:27,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:27,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:27,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:27,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:27,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703812192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:27,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:27,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:22:27,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137480092] [2022-01-18 15:22:27,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:27,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:27,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:27,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:27,847 INFO L87 Difference]: Start difference. First operand 290 states and 856 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:28,192 INFO L93 Difference]: Finished difference Result 539 states and 1504 transitions. [2022-01-18 15:22:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:28,192 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:28,193 INFO L225 Difference]: With dead ends: 539 [2022-01-18 15:22:28,193 INFO L226 Difference]: Without dead ends: 533 [2022-01-18 15:22:28,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:22:28,193 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 103 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:28,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 236 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-18 15:22:28,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 308. [2022-01-18 15:22:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.954397394136808) internal successors, (907), 307 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2022-01-18 15:22:28,197 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2022-01-18 15:22:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:28,197 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2022-01-18 15:22:28,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2022-01-18 15:22:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:28,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:28,197 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:28,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:28,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,438 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:28,398 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:28,398 INFO L85 PathProgramCache]: Analyzing trace with hash -651925608, now seen corresponding path program 438 times [2022-01-18 15:22:28,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:28,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128627949] [2022-01-18 15:22:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:28,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:28,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:28,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128627949] [2022-01-18 15:22:28,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128627949] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:28,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197524334] [2022-01-18 15:22:28,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:28,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:28,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:28,480 INFO L229 MonitoredProcess]: Starting monitored process 439 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:28,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Waiting until timeout for monitored process [2022-01-18 15:22:28,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:22:28,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:28,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:28,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:28,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:28,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:29,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:29,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:29,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197524334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:29,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:29,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 15:22:29,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104541158] [2022-01-18 15:22:29,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:29,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:22:29,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:22:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:29,098 INFO L87 Difference]: Start difference. First operand 308 states and 907 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:29,535 INFO L93 Difference]: Finished difference Result 545 states and 1525 transitions. [2022-01-18 15:22:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:29,536 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:29,536 INFO L225 Difference]: With dead ends: 545 [2022-01-18 15:22:29,537 INFO L226 Difference]: Without dead ends: 545 [2022-01-18 15:22:29,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:22:29,537 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:29,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 266 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:29,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-18 15:22:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 306. [2022-01-18 15:22:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.957377049180328) internal successors, (902), 305 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 902 transitions. [2022-01-18 15:22:29,541 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 902 transitions. Word has length 20 [2022-01-18 15:22:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:29,541 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 902 transitions. [2022-01-18 15:22:29,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:29,541 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 902 transitions. [2022-01-18 15:22:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:29,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:29,541 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:29,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Ended with exit code 0 [2022-01-18 15:22:29,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,439 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:29,743 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:29,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:29,743 INFO L85 PathProgramCache]: Analyzing trace with hash 831209330, now seen corresponding path program 439 times [2022-01-18 15:22:29,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:29,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382071370] [2022-01-18 15:22:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:29,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:29,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:29,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382071370] [2022-01-18 15:22:29,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382071370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:29,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917608581] [2022-01-18 15:22:29,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:29,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:29,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:29,814 INFO L229 MonitoredProcess]: Starting monitored process 440 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:29,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Waiting until timeout for monitored process [2022-01-18 15:22:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:30,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:30,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:30,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:30,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:30,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:30,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917608581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:30,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:30,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:22:30,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593636175] [2022-01-18 15:22:30,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:30,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:22:30,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:30,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:22:30,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:30,376 INFO L87 Difference]: Start difference. First operand 306 states and 902 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:30,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:30,620 INFO L93 Difference]: Finished difference Result 528 states and 1497 transitions. [2022-01-18 15:22:30,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:30,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:30,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:30,621 INFO L225 Difference]: With dead ends: 528 [2022-01-18 15:22:30,621 INFO L226 Difference]: Without dead ends: 528 [2022-01-18 15:22:30,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:22:30,622 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 87 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:30,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 159 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-18 15:22:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 304. [2022-01-18 15:22:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9603960396039604) internal successors, (897), 303 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 897 transitions. [2022-01-18 15:22:30,626 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 897 transitions. Word has length 20 [2022-01-18 15:22:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:30,626 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 897 transitions. [2022-01-18 15:22:30,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 897 transitions. [2022-01-18 15:22:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:30,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:30,626 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:30,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:30,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,440 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:30,827 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:30,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1281219300, now seen corresponding path program 440 times [2022-01-18 15:22:30,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:30,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42969190] [2022-01-18 15:22:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:30,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:30,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:30,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42969190] [2022-01-18 15:22:30,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42969190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:30,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798901805] [2022-01-18 15:22:30,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:30,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:30,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:30,897 INFO L229 MonitoredProcess]: Starting monitored process 441 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:30,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Waiting until timeout for monitored process [2022-01-18 15:22:31,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:31,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:31,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:31,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:31,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:31,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:31,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798901805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:31,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:31,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 15:22:31,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757017610] [2022-01-18 15:22:31,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:31,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:31,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:31,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:31,466 INFO L87 Difference]: Start difference. First operand 304 states and 897 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:31,806 INFO L93 Difference]: Finished difference Result 553 states and 1551 transitions. [2022-01-18 15:22:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:31,807 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:31,808 INFO L225 Difference]: With dead ends: 553 [2022-01-18 15:22:31,808 INFO L226 Difference]: Without dead ends: 553 [2022-01-18 15:22:31,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:22:31,808 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 110 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:31,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 266 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:31,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-18 15:22:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2022-01-18 15:22:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.9583333333333335) internal successors, (852), 288 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2022-01-18 15:22:31,812 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2022-01-18 15:22:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:31,812 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2022-01-18 15:22:31,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2022-01-18 15:22:31,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:31,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:31,812 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:31,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Ended with exit code 0 [2022-01-18 15:22:32,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2022-01-18 15:22:32,013 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:32,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:32,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1907837306, now seen corresponding path program 441 times [2022-01-18 15:22:32,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:32,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889913826] [2022-01-18 15:22:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:32,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:32,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:32,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889913826] [2022-01-18 15:22:32,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889913826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:32,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905479910] [2022-01-18 15:22:32,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:32,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:32,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:32,094 INFO L229 MonitoredProcess]: Starting monitored process 442 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:32,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Waiting until timeout for monitored process [2022-01-18 15:22:32,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:22:32,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:32,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:32,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:32,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:32,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:32,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905479910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:32,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:32,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-18 15:22:32,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059789747] [2022-01-18 15:22:32,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:32,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:22:32,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:32,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:22:32,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:32,679 INFO L87 Difference]: Start difference. First operand 289 states and 852 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:32,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:32,939 INFO L93 Difference]: Finished difference Result 328 states and 952 transitions. [2022-01-18 15:22:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:32,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:32,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:32,939 INFO L225 Difference]: With dead ends: 328 [2022-01-18 15:22:32,939 INFO L226 Difference]: Without dead ends: 316 [2022-01-18 15:22:32,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:22:32,940 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:32,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 135 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-18 15:22:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 295. [2022-01-18 15:22:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9489795918367347) internal successors, (867), 294 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 867 transitions. [2022-01-18 15:22:32,943 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 867 transitions. Word has length 20 [2022-01-18 15:22:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:32,943 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 867 transitions. [2022-01-18 15:22:32,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 867 transitions. [2022-01-18 15:22:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:32,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:32,943 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:32,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:33,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 442 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2022-01-18 15:22:33,143 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1166939972, now seen corresponding path program 442 times [2022-01-18 15:22:33,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:33,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989465826] [2022-01-18 15:22:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:33,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:33,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:33,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989465826] [2022-01-18 15:22:33,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989465826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:33,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175011255] [2022-01-18 15:22:33,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:33,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:33,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:33,206 INFO L229 MonitoredProcess]: Starting monitored process 443 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:33,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Waiting until timeout for monitored process [2022-01-18 15:22:33,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:33,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:33,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:33,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:33,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:22:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:33,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:33,666 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:33,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:33,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175011255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:33,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:33,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:22:33,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535675485] [2022-01-18 15:22:33,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:33,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:22:33,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:33,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:22:33,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:22:33,765 INFO L87 Difference]: Start difference. First operand 295 states and 867 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:33,988 INFO L93 Difference]: Finished difference Result 353 states and 1004 transitions. [2022-01-18 15:22:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:22:33,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:33,989 INFO L225 Difference]: With dead ends: 353 [2022-01-18 15:22:33,989 INFO L226 Difference]: Without dead ends: 347 [2022-01-18 15:22:33,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:22:33,989 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:33,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 111 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-18 15:22:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 305. [2022-01-18 15:22:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9407894736842106) internal successors, (894), 304 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 894 transitions. [2022-01-18 15:22:33,992 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 894 transitions. Word has length 20 [2022-01-18 15:22:33,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:33,992 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 894 transitions. [2022-01-18 15:22:33,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:33,992 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 894 transitions. [2022-01-18 15:22:33,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:33,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:33,993 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:34,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Ended with exit code 0 [2022-01-18 15:22:34,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,443 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:34,193 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:34,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:34,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1143040058, now seen corresponding path program 443 times [2022-01-18 15:22:34,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:34,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644495709] [2022-01-18 15:22:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:34,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:34,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:34,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644495709] [2022-01-18 15:22:34,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644495709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:34,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874479294] [2022-01-18 15:22:34,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:34,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:34,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:34,289 INFO L229 MonitoredProcess]: Starting monitored process 444 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:34,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Waiting until timeout for monitored process [2022-01-18 15:22:34,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:22:34,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:34,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:34,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:34,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:22:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:34,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:34,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:34,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:34,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874479294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:34,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:34,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:22:34,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222802432] [2022-01-18 15:22:34,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:34,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:22:34,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:34,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:22:34,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:34,885 INFO L87 Difference]: Start difference. First operand 305 states and 894 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:35,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:35,106 INFO L93 Difference]: Finished difference Result 324 states and 950 transitions. [2022-01-18 15:22:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:35,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:35,107 INFO L225 Difference]: With dead ends: 324 [2022-01-18 15:22:35,107 INFO L226 Difference]: Without dead ends: 324 [2022-01-18 15:22:35,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:22:35,107 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:35,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 117 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-18 15:22:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 293. [2022-01-18 15:22:35,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.952054794520548) internal successors, (862), 292 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 862 transitions. [2022-01-18 15:22:35,110 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 862 transitions. Word has length 20 [2022-01-18 15:22:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:35,110 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 862 transitions. [2022-01-18 15:22:35,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 862 transitions. [2022-01-18 15:22:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:35,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:35,111 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:35,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:35,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2022-01-18 15:22:35,311 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:35,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1860570146, now seen corresponding path program 444 times [2022-01-18 15:22:35,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:35,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489351614] [2022-01-18 15:22:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:35,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:35,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:35,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489351614] [2022-01-18 15:22:35,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489351614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:35,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192171337] [2022-01-18 15:22:35,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:35,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:35,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:35,372 INFO L229 MonitoredProcess]: Starting monitored process 445 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:35,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Waiting until timeout for monitored process [2022-01-18 15:22:35,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:22:35,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:35,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:35,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:35,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:35,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:35,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:35,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:22:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:35,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192171337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:35,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:35,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:22:35,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531662811] [2022-01-18 15:22:35,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:35,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:22:35,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:22:35,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:22:35,875 INFO L87 Difference]: Start difference. First operand 293 states and 862 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:36,032 INFO L93 Difference]: Finished difference Result 359 states and 1019 transitions. [2022-01-18 15:22:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:36,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:36,033 INFO L225 Difference]: With dead ends: 359 [2022-01-18 15:22:36,033 INFO L226 Difference]: Without dead ends: 353 [2022-01-18 15:22:36,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:36,033 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:36,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 119 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-18 15:22:36,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 307. [2022-01-18 15:22:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9444444444444446) internal successors, (901), 306 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 901 transitions. [2022-01-18 15:22:36,036 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 901 transitions. Word has length 20 [2022-01-18 15:22:36,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:36,036 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 901 transitions. [2022-01-18 15:22:36,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:36,036 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 901 transitions. [2022-01-18 15:22:36,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:36,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:36,036 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:36,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Ended with exit code 0 [2022-01-18 15:22:36,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2022-01-18 15:22:36,237 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:36,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:36,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1884470060, now seen corresponding path program 445 times [2022-01-18 15:22:36,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:36,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134930826] [2022-01-18 15:22:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:36,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:36,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:36,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134930826] [2022-01-18 15:22:36,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134930826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:36,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495438133] [2022-01-18 15:22:36,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:36,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:36,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:36,315 INFO L229 MonitoredProcess]: Starting monitored process 446 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:36,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Waiting until timeout for monitored process [2022-01-18 15:22:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:36,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:36,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:36,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:36,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:36,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:22:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:36,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495438133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:36,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:36,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:22:36,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115936714] [2022-01-18 15:22:36,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:36,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:22:36,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:22:36,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:36,838 INFO L87 Difference]: Start difference. First operand 307 states and 901 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:37,080 INFO L93 Difference]: Finished difference Result 359 states and 1025 transitions. [2022-01-18 15:22:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:37,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:37,080 INFO L225 Difference]: With dead ends: 359 [2022-01-18 15:22:37,080 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 15:22:37,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:22:37,081 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:37,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 195 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:37,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 15:22:37,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 305. [2022-01-18 15:22:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9473684210526314) internal successors, (896), 304 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 896 transitions. [2022-01-18 15:22:37,084 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 896 transitions. Word has length 20 [2022-01-18 15:22:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:37,084 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 896 transitions. [2022-01-18 15:22:37,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 896 transitions. [2022-01-18 15:22:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:37,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:37,084 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:37,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:37,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2022-01-18 15:22:37,285 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:37,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:37,285 INFO L85 PathProgramCache]: Analyzing trace with hash -927362298, now seen corresponding path program 446 times [2022-01-18 15:22:37,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:37,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559957041] [2022-01-18 15:22:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:37,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:37,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:37,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559957041] [2022-01-18 15:22:37,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559957041] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:37,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614857447] [2022-01-18 15:22:37,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:37,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:37,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:37,353 INFO L229 MonitoredProcess]: Starting monitored process 447 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:37,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Waiting until timeout for monitored process [2022-01-18 15:22:37,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:37,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:37,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:37,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:37,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:37,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:37,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:22:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:37,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614857447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:37,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:37,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:22:37,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625943886] [2022-01-18 15:22:37,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:37,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:22:37,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:37,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:22:37,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:37,853 INFO L87 Difference]: Start difference. First operand 305 states and 896 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:38,037 INFO L93 Difference]: Finished difference Result 334 states and 975 transitions. [2022-01-18 15:22:38,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:38,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:38,038 INFO L225 Difference]: With dead ends: 334 [2022-01-18 15:22:38,038 INFO L226 Difference]: Without dead ends: 334 [2022-01-18 15:22:38,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:38,038 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:38,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 148 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-18 15:22:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2022-01-18 15:22:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9551724137931035) internal successors, (857), 290 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2022-01-18 15:22:38,041 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2022-01-18 15:22:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:38,041 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2022-01-18 15:22:38,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2022-01-18 15:22:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:38,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:38,042 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:38,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Ended with exit code 0 [2022-01-18 15:22:38,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2022-01-18 15:22:38,255 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash 799792056, now seen corresponding path program 447 times [2022-01-18 15:22:38,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:38,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707103360] [2022-01-18 15:22:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:38,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:38,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:38,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707103360] [2022-01-18 15:22:38,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707103360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:38,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599532977] [2022-01-18 15:22:38,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:38,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:38,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:38,314 INFO L229 MonitoredProcess]: Starting monitored process 448 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:38,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Waiting until timeout for monitored process [2022-01-18 15:22:38,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:22:38,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:38,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:38,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:38,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:38,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:38,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:38,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:38,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599532977] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:38,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:38,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:22:38,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408314623] [2022-01-18 15:22:38,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:38,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:22:38,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:22:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:22:38,796 INFO L87 Difference]: Start difference. First operand 291 states and 857 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:38,978 INFO L93 Difference]: Finished difference Result 418 states and 1160 transitions. [2022-01-18 15:22:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:38,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:38,979 INFO L225 Difference]: With dead ends: 418 [2022-01-18 15:22:38,979 INFO L226 Difference]: Without dead ends: 412 [2022-01-18 15:22:38,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:38,979 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:38,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 172 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-18 15:22:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2022-01-18 15:22:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.948051948051948) internal successors, (908), 308 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 908 transitions. [2022-01-18 15:22:38,983 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 908 transitions. Word has length 20 [2022-01-18 15:22:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:38,983 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 908 transitions. [2022-01-18 15:22:38,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 908 transitions. [2022-01-18 15:22:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:38,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:38,984 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:39,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Ended with exit code 0 [2022-01-18 15:22:39,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2022-01-18 15:22:39,184 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:39,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:39,184 INFO L85 PathProgramCache]: Analyzing trace with hash 823691970, now seen corresponding path program 448 times [2022-01-18 15:22:39,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:39,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405385919] [2022-01-18 15:22:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:39,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:39,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405385919] [2022-01-18 15:22:39,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405385919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841467749] [2022-01-18 15:22:39,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:39,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:39,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:39,259 INFO L229 MonitoredProcess]: Starting monitored process 449 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:39,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Waiting until timeout for monitored process [2022-01-18 15:22:39,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:39,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:39,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:39,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:39,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:39,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:39,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:39,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:39,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841467749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:39,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:39,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 15:22:39,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831754805] [2022-01-18 15:22:39,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:39,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:22:39,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:39,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:22:39,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:39,781 INFO L87 Difference]: Start difference. First operand 309 states and 908 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:40,049 INFO L93 Difference]: Finished difference Result 418 states and 1166 transitions. [2022-01-18 15:22:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:40,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:40,050 INFO L225 Difference]: With dead ends: 418 [2022-01-18 15:22:40,050 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 15:22:40,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:22:40,051 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 101 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:40,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 243 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 15:22:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 307. [2022-01-18 15:22:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.950980392156863) internal successors, (903), 306 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 903 transitions. [2022-01-18 15:22:40,054 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 903 transitions. Word has length 20 [2022-01-18 15:22:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:40,054 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 903 transitions. [2022-01-18 15:22:40,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 903 transitions. [2022-01-18 15:22:40,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:40,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:40,055 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:40,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:40,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,449 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:40,255 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:40,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1988140388, now seen corresponding path program 449 times [2022-01-18 15:22:40,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:40,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789557605] [2022-01-18 15:22:40,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:40,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:40,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:40,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789557605] [2022-01-18 15:22:40,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789557605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:40,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008068335] [2022-01-18 15:22:40,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:40,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:40,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:40,319 INFO L229 MonitoredProcess]: Starting monitored process 450 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:40,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Waiting until timeout for monitored process [2022-01-18 15:22:40,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:22:40,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:40,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:40,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:40,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:40,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:40,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:40,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008068335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:40,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:40,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:22:40,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522289559] [2022-01-18 15:22:40,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:40,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:22:40,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:22:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:22:40,781 INFO L87 Difference]: Start difference. First operand 307 states and 903 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:40,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:40,946 INFO L93 Difference]: Finished difference Result 407 states and 1153 transitions. [2022-01-18 15:22:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:40,947 INFO L225 Difference]: With dead ends: 407 [2022-01-18 15:22:40,947 INFO L226 Difference]: Without dead ends: 407 [2022-01-18 15:22:40,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:22:40,947 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:40,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 133 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-18 15:22:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 305. [2022-01-18 15:22:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9539473684210527) internal successors, (898), 304 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 898 transitions. [2022-01-18 15:22:40,950 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 898 transitions. Word has length 20 [2022-01-18 15:22:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:40,950 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 898 transitions. [2022-01-18 15:22:40,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 898 transitions. [2022-01-18 15:22:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:40,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:40,951 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:40,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Ended with exit code 0 [2022-01-18 15:22:41,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,450 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:41,151 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:41,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:41,151 INFO L85 PathProgramCache]: Analyzing trace with hash 194398278, now seen corresponding path program 450 times [2022-01-18 15:22:41,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:41,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160947138] [2022-01-18 15:22:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:41,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:41,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:41,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160947138] [2022-01-18 15:22:41,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160947138] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:41,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988099745] [2022-01-18 15:22:41,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:41,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:41,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:41,212 INFO L229 MonitoredProcess]: Starting monitored process 451 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:41,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Waiting until timeout for monitored process [2022-01-18 15:22:41,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:22:41,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:41,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:41,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:41,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:41,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:41,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:22:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:41,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988099745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:41,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:41,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 15:22:41,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224902819] [2022-01-18 15:22:41,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:41,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:22:41,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:41,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:22:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:22:41,657 INFO L87 Difference]: Start difference. First operand 305 states and 898 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:41,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:41,842 INFO L93 Difference]: Finished difference Result 397 states and 1126 transitions. [2022-01-18 15:22:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:41,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:41,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:41,843 INFO L225 Difference]: With dead ends: 397 [2022-01-18 15:22:41,843 INFO L226 Difference]: Without dead ends: 397 [2022-01-18 15:22:41,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:22:41,843 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:41,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 174 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:41,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-18 15:22:41,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 291. [2022-01-18 15:22:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9551724137931035) internal successors, (857), 290 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2022-01-18 15:22:41,847 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2022-01-18 15:22:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:41,847 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2022-01-18 15:22:41,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2022-01-18 15:22:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:41,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:41,847 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:41,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Ended with exit code 0 [2022-01-18 15:22:42,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,451 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:42,047 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:42,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:42,048 INFO L85 PathProgramCache]: Analyzing trace with hash 647981362, now seen corresponding path program 451 times [2022-01-18 15:22:42,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:42,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889167230] [2022-01-18 15:22:42,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:42,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:42,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:42,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889167230] [2022-01-18 15:22:42,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889167230] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:42,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662551918] [2022-01-18 15:22:42,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:42,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:42,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:42,127 INFO L229 MonitoredProcess]: Starting monitored process 452 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:42,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Waiting until timeout for monitored process [2022-01-18 15:22:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:42,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:42,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:42,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:22:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:42,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:42,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:42,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:42,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662551918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:42,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:42,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:22:42,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606772442] [2022-01-18 15:22:42,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:42,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:42,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:42,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:42,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:42,856 INFO L87 Difference]: Start difference. First operand 291 states and 857 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:43,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:43,217 INFO L93 Difference]: Finished difference Result 592 states and 1701 transitions. [2022-01-18 15:22:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:43,217 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:43,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:43,218 INFO L225 Difference]: With dead ends: 592 [2022-01-18 15:22:43,218 INFO L226 Difference]: Without dead ends: 592 [2022-01-18 15:22:43,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:22:43,218 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 141 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:43,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 176 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-18 15:22:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 303. [2022-01-18 15:22:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9900662251655628) internal successors, (903), 302 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:43,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2022-01-18 15:22:43,223 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2022-01-18 15:22:43,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:43,223 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2022-01-18 15:22:43,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2022-01-18 15:22:43,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:43,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:43,223 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:43,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Ended with exit code 0 [2022-01-18 15:22:43,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,452 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:43,423 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:43,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:43,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1530058796, now seen corresponding path program 452 times [2022-01-18 15:22:43,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:43,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204751846] [2022-01-18 15:22:43,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:43,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:43,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204751846] [2022-01-18 15:22:43,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204751846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386506959] [2022-01-18 15:22:43,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:43,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:43,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:43,503 INFO L229 MonitoredProcess]: Starting monitored process 453 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:43,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Waiting until timeout for monitored process [2022-01-18 15:22:43,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:43,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:43,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:43,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:43,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:22:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:44,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:44,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:44,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:44,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386506959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:44,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:44,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:22:44,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115405617] [2022-01-18 15:22:44,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:44,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:22:44,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:22:44,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:44,244 INFO L87 Difference]: Start difference. First operand 303 states and 903 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:44,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:44,664 INFO L93 Difference]: Finished difference Result 598 states and 1708 transitions. [2022-01-18 15:22:44,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:44,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:44,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:44,665 INFO L225 Difference]: With dead ends: 598 [2022-01-18 15:22:44,665 INFO L226 Difference]: Without dead ends: 592 [2022-01-18 15:22:44,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:22:44,666 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 148 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:44,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 166 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-18 15:22:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 300. [2022-01-18 15:22:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.983277591973244) internal successors, (892), 299 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 892 transitions. [2022-01-18 15:22:44,670 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 892 transitions. Word has length 20 [2022-01-18 15:22:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:44,670 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 892 transitions. [2022-01-18 15:22:44,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:44,670 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 892 transitions. [2022-01-18 15:22:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:44,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:44,670 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:44,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Ended with exit code 0 [2022-01-18 15:22:44,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,453 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:44,870 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:44,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:44,871 INFO L85 PathProgramCache]: Analyzing trace with hash 994828994, now seen corresponding path program 453 times [2022-01-18 15:22:44,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:44,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634122736] [2022-01-18 15:22:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:44,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:44,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:44,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634122736] [2022-01-18 15:22:44,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634122736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:44,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254153473] [2022-01-18 15:22:44,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:44,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:44,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:44,948 INFO L229 MonitoredProcess]: Starting monitored process 454 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:44,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Waiting until timeout for monitored process [2022-01-18 15:22:45,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:22:45,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:45,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:45,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:45,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:45,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:45,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:45,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:45,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254153473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:45,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:45,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:22:45,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083181956] [2022-01-18 15:22:45,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:45,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:45,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:45,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:45,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:45,653 INFO L87 Difference]: Start difference. First operand 300 states and 892 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:45,963 INFO L93 Difference]: Finished difference Result 562 states and 1626 transitions. [2022-01-18 15:22:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:45,964 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:45,964 INFO L225 Difference]: With dead ends: 562 [2022-01-18 15:22:45,964 INFO L226 Difference]: Without dead ends: 550 [2022-01-18 15:22:45,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:22:45,965 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 114 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:45,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 128 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:45,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-01-18 15:22:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 297. [2022-01-18 15:22:45,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9763513513513513) internal successors, (881), 296 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:45,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2022-01-18 15:22:45,968 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2022-01-18 15:22:45,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:45,969 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2022-01-18 15:22:45,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:45,969 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2022-01-18 15:22:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:45,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:45,969 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:45,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Ended with exit code 0 [2022-01-18 15:22:46,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2022-01-18 15:22:46,169 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:46,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:46,170 INFO L85 PathProgramCache]: Analyzing trace with hash -17863538, now seen corresponding path program 454 times [2022-01-18 15:22:46,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:46,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303291077] [2022-01-18 15:22:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:46,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:46,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:46,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303291077] [2022-01-18 15:22:46,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303291077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:46,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915720100] [2022-01-18 15:22:46,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:46,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:46,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:46,249 INFO L229 MonitoredProcess]: Starting monitored process 455 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:46,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Waiting until timeout for monitored process [2022-01-18 15:22:46,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:46,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:46,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:46,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:46,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:46,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:46,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:46,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:46,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915720100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:46,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:46,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:22:46,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134349262] [2022-01-18 15:22:46,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:46,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:22:46,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:46,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:22:46,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:22:46,922 INFO L87 Difference]: Start difference. First operand 297 states and 881 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:47,249 INFO L93 Difference]: Finished difference Result 594 states and 1686 transitions. [2022-01-18 15:22:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:47,250 INFO L225 Difference]: With dead ends: 594 [2022-01-18 15:22:47,250 INFO L226 Difference]: Without dead ends: 576 [2022-01-18 15:22:47,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:22:47,251 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:47,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 163 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-18 15:22:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 294. [2022-01-18 15:22:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.969283276450512) internal successors, (870), 293 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2022-01-18 15:22:47,254 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2022-01-18 15:22:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:47,254 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2022-01-18 15:22:47,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:47,255 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2022-01-18 15:22:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:47,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:47,255 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:47,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Ended with exit code 0 [2022-01-18 15:22:47,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2022-01-18 15:22:47,455 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:47,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1605644534, now seen corresponding path program 455 times [2022-01-18 15:22:47,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:47,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022229296] [2022-01-18 15:22:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:47,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:47,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:47,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022229296] [2022-01-18 15:22:47,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022229296] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:47,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548105996] [2022-01-18 15:22:47,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:47,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:47,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:47,542 INFO L229 MonitoredProcess]: Starting monitored process 456 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:47,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Waiting until timeout for monitored process [2022-01-18 15:22:47,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:47,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:47,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:47,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:48,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:22:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:48,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:48,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:48,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:48,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548105996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:48,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:48,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:22:48,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179981010] [2022-01-18 15:22:48,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:48,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:48,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:48,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:48,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:48,332 INFO L87 Difference]: Start difference. First operand 294 states and 870 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:48,688 INFO L93 Difference]: Finished difference Result 604 states and 1731 transitions. [2022-01-18 15:22:48,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:48,688 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:48,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:48,689 INFO L225 Difference]: With dead ends: 604 [2022-01-18 15:22:48,689 INFO L226 Difference]: Without dead ends: 604 [2022-01-18 15:22:48,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:22:48,689 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 130 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:48,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 165 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-18 15:22:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 301. [2022-01-18 15:22:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.99) internal successors, (897), 300 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 897 transitions. [2022-01-18 15:22:48,693 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 897 transitions. Word has length 20 [2022-01-18 15:22:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:48,694 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 897 transitions. [2022-01-18 15:22:48,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 897 transitions. [2022-01-18 15:22:48,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:48,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:48,694 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:48,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Ended with exit code 0 [2022-01-18 15:22:48,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,456 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:48,894 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:48,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:48,895 INFO L85 PathProgramCache]: Analyzing trace with hash -723567100, now seen corresponding path program 456 times [2022-01-18 15:22:48,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:48,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144635671] [2022-01-18 15:22:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:48,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:48,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:48,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144635671] [2022-01-18 15:22:48,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144635671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:48,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926952744] [2022-01-18 15:22:48,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:48,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:48,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:48,982 INFO L229 MonitoredProcess]: Starting monitored process 457 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:48,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Waiting until timeout for monitored process [2022-01-18 15:22:49,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:22:49,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:49,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:49,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:49,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:22:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:49,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:49,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:49,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:49,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926952744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:49,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:49,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:22:49,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885035718] [2022-01-18 15:22:49,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:49,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:22:49,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:49,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:22:49,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:49,760 INFO L87 Difference]: Start difference. First operand 301 states and 897 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:50,179 INFO L93 Difference]: Finished difference Result 610 states and 1738 transitions. [2022-01-18 15:22:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:50,179 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:50,180 INFO L225 Difference]: With dead ends: 610 [2022-01-18 15:22:50,180 INFO L226 Difference]: Without dead ends: 604 [2022-01-18 15:22:50,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:22:50,180 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:50,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 190 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:50,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-18 15:22:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 298. [2022-01-18 15:22:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.983164983164983) internal successors, (886), 297 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2022-01-18 15:22:50,184 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2022-01-18 15:22:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:50,184 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2022-01-18 15:22:50,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2022-01-18 15:22:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:50,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:50,185 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:50,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Forceful destruction successful, exit code 0 [2022-01-18 15:22:50,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,457 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:50,385 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:50,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1258796902, now seen corresponding path program 457 times [2022-01-18 15:22:50,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:50,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412137793] [2022-01-18 15:22:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:50,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:50,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:50,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412137793] [2022-01-18 15:22:50,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412137793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:50,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090678524] [2022-01-18 15:22:50,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:50,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:50,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:50,478 INFO L229 MonitoredProcess]: Starting monitored process 458 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:50,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Waiting until timeout for monitored process [2022-01-18 15:22:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:50,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:50,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:50,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:22:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:51,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:51,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:51,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:51,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090678524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:51,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:51,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:22:51,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125010527] [2022-01-18 15:22:51,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:51,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:22:51,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:51,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:22:51,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:22:51,193 INFO L87 Difference]: Start difference. First operand 298 states and 886 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:51,477 INFO L93 Difference]: Finished difference Result 574 states and 1656 transitions. [2022-01-18 15:22:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:51,478 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:51,478 INFO L225 Difference]: With dead ends: 574 [2022-01-18 15:22:51,478 INFO L226 Difference]: Without dead ends: 562 [2022-01-18 15:22:51,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:22:51,479 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 116 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:51,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 146 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:22:51,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-18 15:22:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 295. [2022-01-18 15:22:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9761904761904763) internal successors, (875), 294 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2022-01-18 15:22:51,482 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2022-01-18 15:22:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:51,483 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2022-01-18 15:22:51,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2022-01-18 15:22:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:51,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:51,483 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:51,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Ended with exit code 0 [2022-01-18 15:22:51,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2022-01-18 15:22:51,683 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:51,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:51,684 INFO L85 PathProgramCache]: Analyzing trace with hash -112663660, now seen corresponding path program 458 times [2022-01-18 15:22:51,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:51,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927282020] [2022-01-18 15:22:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:51,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:51,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:51,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927282020] [2022-01-18 15:22:51,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927282020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:51,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794682996] [2022-01-18 15:22:51,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:22:51,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:51,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:51,773 INFO L229 MonitoredProcess]: Starting monitored process 459 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:51,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Waiting until timeout for monitored process [2022-01-18 15:22:52,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:22:52,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:52,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:52,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-01-18 15:22:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:52,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:52,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:52,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:52,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794682996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:52,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:52,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:22:52,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802224969] [2022-01-18 15:22:52,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:52,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:52,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:52,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:52,593 INFO L87 Difference]: Start difference. First operand 295 states and 875 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:53,044 INFO L93 Difference]: Finished difference Result 682 states and 1928 transitions. [2022-01-18 15:22:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:22:53,044 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:53,045 INFO L225 Difference]: With dead ends: 682 [2022-01-18 15:22:53,045 INFO L226 Difference]: Without dead ends: 682 [2022-01-18 15:22:53,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:22:53,045 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 185 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:53,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 156 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-18 15:22:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 303. [2022-01-18 15:22:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0165562913907285) internal successors, (911), 302 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 911 transitions. [2022-01-18 15:22:53,050 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 911 transitions. Word has length 20 [2022-01-18 15:22:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:53,050 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 911 transitions. [2022-01-18 15:22:53,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 911 transitions. [2022-01-18 15:22:53,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:53,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:53,050 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:53,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Ended with exit code 0 [2022-01-18 15:22:53,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 459 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2022-01-18 15:22:53,251 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:53,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:53,251 INFO L85 PathProgramCache]: Analyzing trace with hash 769413774, now seen corresponding path program 459 times [2022-01-18 15:22:53,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:53,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607704434] [2022-01-18 15:22:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:53,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:53,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:53,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607704434] [2022-01-18 15:22:53,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607704434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:53,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854925753] [2022-01-18 15:22:53,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:22:53,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:53,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:53,343 INFO L229 MonitoredProcess]: Starting monitored process 460 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:53,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Waiting until timeout for monitored process [2022-01-18 15:22:53,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:22:53,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:53,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:53,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:22:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:53,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:54,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:54,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:54,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854925753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:54,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:54,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:22:54,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709243314] [2022-01-18 15:22:54,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:54,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:22:54,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:54,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:22:54,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:54,131 INFO L87 Difference]: Start difference. First operand 303 states and 911 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:54,855 INFO L93 Difference]: Finished difference Result 711 states and 1974 transitions. [2022-01-18 15:22:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:22:54,855 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:54,856 INFO L225 Difference]: With dead ends: 711 [2022-01-18 15:22:54,856 INFO L226 Difference]: Without dead ends: 705 [2022-01-18 15:22:54,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:22:54,856 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 190 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:54,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 273 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-01-18 15:22:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 306. [2022-01-18 15:22:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9934426229508198) internal successors, (913), 305 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 913 transitions. [2022-01-18 15:22:54,861 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 913 transitions. Word has length 20 [2022-01-18 15:22:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:54,861 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 913 transitions. [2022-01-18 15:22:54,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 913 transitions. [2022-01-18 15:22:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:54,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:54,861 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:54,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Ended with exit code 0 [2022-01-18 15:22:55,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,460 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:55,062 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:55,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:55,062 INFO L85 PathProgramCache]: Analyzing trace with hash 628233674, now seen corresponding path program 460 times [2022-01-18 15:22:55,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:55,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709850984] [2022-01-18 15:22:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:55,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:55,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:55,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709850984] [2022-01-18 15:22:55,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709850984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:55,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583615373] [2022-01-18 15:22:55,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:22:55,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:55,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:55,152 INFO L229 MonitoredProcess]: Starting monitored process 461 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:55,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Waiting until timeout for monitored process [2022-01-18 15:22:55,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:22:55,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:55,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:55,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:55,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:22:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:55,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:55,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:55,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:56,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583615373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:56,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:56,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:22:56,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27875913] [2022-01-18 15:22:56,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:56,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:56,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:56,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:56,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:56,022 INFO L87 Difference]: Start difference. First operand 306 states and 913 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:56,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:56,389 INFO L93 Difference]: Finished difference Result 650 states and 1849 transitions. [2022-01-18 15:22:56,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:22:56,389 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:56,390 INFO L225 Difference]: With dead ends: 650 [2022-01-18 15:22:56,390 INFO L226 Difference]: Without dead ends: 650 [2022-01-18 15:22:56,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:22:56,390 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:56,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 155 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-18 15:22:56,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 299. [2022-01-18 15:22:56,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0033557046979866) internal successors, (895), 298 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:56,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 895 transitions. [2022-01-18 15:22:56,395 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 895 transitions. Word has length 20 [2022-01-18 15:22:56,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:56,395 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 895 transitions. [2022-01-18 15:22:56,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:56,395 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 895 transitions. [2022-01-18 15:22:56,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:56,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:56,395 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:56,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Ended with exit code 0 [2022-01-18 15:22:56,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,461 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:56,595 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1622609294, now seen corresponding path program 461 times [2022-01-18 15:22:56,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:56,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92161863] [2022-01-18 15:22:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:56,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:56,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:56,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92161863] [2022-01-18 15:22:56,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92161863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:56,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013550880] [2022-01-18 15:22:56,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:22:56,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:56,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:56,689 INFO L229 MonitoredProcess]: Starting monitored process 462 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:56,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Waiting until timeout for monitored process [2022-01-18 15:22:56,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:22:56,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:56,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:56,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:57,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-01-18 15:22:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:57,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:57,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:57,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:57,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013550880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:57,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:57,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:22:57,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293062495] [2022-01-18 15:22:57,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:57,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:22:57,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:57,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:22:57,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:22:57,555 INFO L87 Difference]: Start difference. First operand 299 states and 895 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:57,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:57,927 INFO L93 Difference]: Finished difference Result 646 states and 1838 transitions. [2022-01-18 15:22:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:22:57,927 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:57,928 INFO L225 Difference]: With dead ends: 646 [2022-01-18 15:22:57,928 INFO L226 Difference]: Without dead ends: 646 [2022-01-18 15:22:57,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:22:57,928 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 172 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:57,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 166 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-18 15:22:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 296. [2022-01-18 15:22:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.983050847457627) internal successors, (880), 295 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 880 transitions. [2022-01-18 15:22:57,932 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 880 transitions. Word has length 20 [2022-01-18 15:22:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:57,932 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 880 transitions. [2022-01-18 15:22:57,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 880 transitions. [2022-01-18 15:22:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:57,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:57,933 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:57,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Ended with exit code 0 [2022-01-18 15:22:58,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,462 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:58,133 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:58,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1691904870, now seen corresponding path program 462 times [2022-01-18 15:22:58,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:58,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281824256] [2022-01-18 15:22:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:58,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:58,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:58,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281824256] [2022-01-18 15:22:58,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281824256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:58,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774248337] [2022-01-18 15:22:58,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:22:58,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:58,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:58,222 INFO L229 MonitoredProcess]: Starting monitored process 463 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:58,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Waiting until timeout for monitored process [2022-01-18 15:22:58,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:22:58,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:22:58,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:22:58,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:22:58,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 81 [2022-01-18 15:22:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:58,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:22:58,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:22:58,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:22:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:59,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774248337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:22:59,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:22:59,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:22:59,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344894519] [2022-01-18 15:22:59,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:22:59,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:22:59,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:22:59,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:22:59,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:22:59,034 INFO L87 Difference]: Start difference. First operand 296 states and 880 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:22:59,638 INFO L93 Difference]: Finished difference Result 650 states and 1841 transitions. [2022-01-18 15:22:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:22:59,639 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:22:59,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:22:59,640 INFO L225 Difference]: With dead ends: 650 [2022-01-18 15:22:59,640 INFO L226 Difference]: Without dead ends: 644 [2022-01-18 15:22:59,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:22:59,640 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 180 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:22:59,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 180 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:22:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-01-18 15:22:59,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 306. [2022-01-18 15:22:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9737704918032786) internal successors, (907), 305 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:59,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 907 transitions. [2022-01-18 15:22:59,644 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 907 transitions. Word has length 20 [2022-01-18 15:22:59,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:22:59,644 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 907 transitions. [2022-01-18 15:22:59,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:22:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 907 transitions. [2022-01-18 15:22:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:22:59,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:22:59,645 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:22:59,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Ended with exit code 0 [2022-01-18 15:22:59,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2022-01-18 15:22:59,845 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:22:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:22:59,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1668004956, now seen corresponding path program 463 times [2022-01-18 15:22:59,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:22:59,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285959852] [2022-01-18 15:22:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:22:59,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:22:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:22:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:22:59,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:22:59,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285959852] [2022-01-18 15:22:59,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285959852] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:22:59,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963693290] [2022-01-18 15:22:59,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:22:59,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:22:59,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:22:59,932 INFO L229 MonitoredProcess]: Starting monitored process 464 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:22:59,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Waiting until timeout for monitored process [2022-01-18 15:23:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:00,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:00,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:00,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:23:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:00,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:00,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:00,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:00,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963693290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:00,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:00,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:00,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686672846] [2022-01-18 15:23:00,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:00,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:00,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:00,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:00,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:00,734 INFO L87 Difference]: Start difference. First operand 306 states and 907 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:01,247 INFO L93 Difference]: Finished difference Result 627 states and 1802 transitions. [2022-01-18 15:23:01,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:01,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:01,248 INFO L225 Difference]: With dead ends: 627 [2022-01-18 15:23:01,248 INFO L226 Difference]: Without dead ends: 627 [2022-01-18 15:23:01,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:23:01,248 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 165 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:01,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 195 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:01,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-18 15:23:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 295. [2022-01-18 15:23:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9761904761904763) internal successors, (875), 294 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2022-01-18 15:23:01,252 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2022-01-18 15:23:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:01,252 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2022-01-18 15:23:01,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2022-01-18 15:23:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:01,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:01,253 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:01,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Ended with exit code 0 [2022-01-18 15:23:01,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2022-01-18 15:23:01,453 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:01,453 INFO L85 PathProgramCache]: Analyzing trace with hash -250263538, now seen corresponding path program 464 times [2022-01-18 15:23:01,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:01,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651422255] [2022-01-18 15:23:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:01,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:01,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:01,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651422255] [2022-01-18 15:23:01,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651422255] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:01,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846492152] [2022-01-18 15:23:01,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:01,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:01,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:01,536 INFO L229 MonitoredProcess]: Starting monitored process 465 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:01,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Waiting until timeout for monitored process [2022-01-18 15:23:01,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:01,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:01,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:01,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:02,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:02,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:02,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:02,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:02,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846492152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:02,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:02,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:23:02,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184640339] [2022-01-18 15:23:02,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:02,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:02,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:02,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:02,253 INFO L87 Difference]: Start difference. First operand 295 states and 875 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:02,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:02,622 INFO L93 Difference]: Finished difference Result 567 states and 1639 transitions. [2022-01-18 15:23:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:02,622 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:02,623 INFO L225 Difference]: With dead ends: 567 [2022-01-18 15:23:02,623 INFO L226 Difference]: Without dead ends: 555 [2022-01-18 15:23:02,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:23:02,623 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:02,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 172 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-18 15:23:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 297. [2022-01-18 15:23:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.972972972972973) internal successors, (880), 296 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 880 transitions. [2022-01-18 15:23:02,627 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 880 transitions. Word has length 20 [2022-01-18 15:23:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:02,627 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 880 transitions. [2022-01-18 15:23:02,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 880 transitions. [2022-01-18 15:23:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:02,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:02,628 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:02,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Ended with exit code 0 [2022-01-18 15:23:02,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2022-01-18 15:23:02,828 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:02,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash 490633796, now seen corresponding path program 465 times [2022-01-18 15:23:02,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:02,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608824946] [2022-01-18 15:23:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:02,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:02,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:02,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608824946] [2022-01-18 15:23:02,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608824946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:02,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246440150] [2022-01-18 15:23:02,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:02,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:02,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:02,914 INFO L229 MonitoredProcess]: Starting monitored process 466 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:02,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Waiting until timeout for monitored process [2022-01-18 15:23:03,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:23:03,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:03,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:03,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:03,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:23:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:03,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:03,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:03,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:03,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246440150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:03,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:03,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:03,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342999431] [2022-01-18 15:23:03,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:03,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:03,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:03,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:03,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:03,663 INFO L87 Difference]: Start difference. First operand 297 states and 880 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:04,134 INFO L93 Difference]: Finished difference Result 592 states and 1691 transitions. [2022-01-18 15:23:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:04,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:04,135 INFO L225 Difference]: With dead ends: 592 [2022-01-18 15:23:04,136 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 15:23:04,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:04,136 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 152 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:04,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 204 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 15:23:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 307. [2022-01-18 15:23:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9640522875816995) internal successors, (907), 306 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2022-01-18 15:23:04,140 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2022-01-18 15:23:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:04,140 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2022-01-18 15:23:04,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2022-01-18 15:23:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:04,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:04,140 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:04,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Ended with exit code 0 [2022-01-18 15:23:04,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable466,466 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:04,341 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:04,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:04,341 INFO L85 PathProgramCache]: Analyzing trace with hash 514533710, now seen corresponding path program 466 times [2022-01-18 15:23:04,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:04,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068230705] [2022-01-18 15:23:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:04,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:04,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:04,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068230705] [2022-01-18 15:23:04,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068230705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:04,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5850338] [2022-01-18 15:23:04,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:04,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:04,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:04,426 INFO L229 MonitoredProcess]: Starting monitored process 467 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:04,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Waiting until timeout for monitored process [2022-01-18 15:23:04,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:04,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:04,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:04,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:04,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:23:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:04,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:05,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:05,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:05,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5850338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:05,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:05,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:05,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623374937] [2022-01-18 15:23:05,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:05,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:05,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:05,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:05,211 INFO L87 Difference]: Start difference. First operand 307 states and 907 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:05,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:05,522 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2022-01-18 15:23:05,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:05,523 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:05,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:05,523 INFO L225 Difference]: With dead ends: 563 [2022-01-18 15:23:05,523 INFO L226 Difference]: Without dead ends: 563 [2022-01-18 15:23:05,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:23:05,524 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 106 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:05,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 135 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-18 15:23:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 294. [2022-01-18 15:23:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.969283276450512) internal successors, (870), 293 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2022-01-18 15:23:05,527 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2022-01-18 15:23:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:05,527 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2022-01-18 15:23:05,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2022-01-18 15:23:05,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:05,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:05,528 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:05,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Ended with exit code 0 [2022-01-18 15:23:05,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,467 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:05,728 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:05,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1181899674, now seen corresponding path program 467 times [2022-01-18 15:23:05,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:05,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470909001] [2022-01-18 15:23:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:05,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:05,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:05,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470909001] [2022-01-18 15:23:05,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470909001] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:05,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829095146] [2022-01-18 15:23:05,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:05,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:05,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:05,802 INFO L229 MonitoredProcess]: Starting monitored process 468 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:05,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Waiting until timeout for monitored process [2022-01-18 15:23:06,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:06,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:06,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:06,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:06,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:06,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:06,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:06,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:06,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829095146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:06,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:06,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:23:06,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402050438] [2022-01-18 15:23:06,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:06,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:23:06,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:23:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:23:06,451 INFO L87 Difference]: Start difference. First operand 294 states and 870 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:06,760 INFO L93 Difference]: Finished difference Result 651 states and 1821 transitions. [2022-01-18 15:23:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:06,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:06,761 INFO L225 Difference]: With dead ends: 651 [2022-01-18 15:23:06,761 INFO L226 Difference]: Without dead ends: 633 [2022-01-18 15:23:06,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:06,762 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 175 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:06,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 148 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-18 15:23:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 296. [2022-01-18 15:23:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9661016949152543) internal successors, (875), 295 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 875 transitions. [2022-01-18 15:23:06,766 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 875 transitions. Word has length 20 [2022-01-18 15:23:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:06,766 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 875 transitions. [2022-01-18 15:23:06,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:06,766 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 875 transitions. [2022-01-18 15:23:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:06,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:06,766 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:06,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Ended with exit code 0 [2022-01-18 15:23:06,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2022-01-18 15:23:06,967 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:06,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:06,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1523197246, now seen corresponding path program 468 times [2022-01-18 15:23:06,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:06,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678831420] [2022-01-18 15:23:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:06,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:07,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:07,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678831420] [2022-01-18 15:23:07,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678831420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:07,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029282771] [2022-01-18 15:23:07,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:07,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:07,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:07,092 INFO L229 MonitoredProcess]: Starting monitored process 469 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:07,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Waiting until timeout for monitored process [2022-01-18 15:23:07,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:23:07,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:07,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:07,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:07,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:07,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:07,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:07,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:07,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029282771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:07,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:07,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:23:07,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495530828] [2022-01-18 15:23:07,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:07,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:07,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:07,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:07,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:07,789 INFO L87 Difference]: Start difference. First operand 296 states and 875 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:08,114 INFO L93 Difference]: Finished difference Result 612 states and 1742 transitions. [2022-01-18 15:23:08,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:08,114 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:08,115 INFO L225 Difference]: With dead ends: 612 [2022-01-18 15:23:08,115 INFO L226 Difference]: Without dead ends: 600 [2022-01-18 15:23:08,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:23:08,115 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 145 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:08,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 124 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-18 15:23:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 298. [2022-01-18 15:23:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.962962962962963) internal successors, (880), 297 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:08,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 880 transitions. [2022-01-18 15:23:08,119 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 880 transitions. Word has length 20 [2022-01-18 15:23:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:08,119 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 880 transitions. [2022-01-18 15:23:08,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:08,119 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 880 transitions. [2022-01-18 15:23:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:08,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:08,120 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:08,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Ended with exit code 0 [2022-01-18 15:23:08,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,469 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:08,320 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:08,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash -782299912, now seen corresponding path program 469 times [2022-01-18 15:23:08,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:08,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122041858] [2022-01-18 15:23:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:08,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:08,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:08,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122041858] [2022-01-18 15:23:08,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122041858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:08,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206088451] [2022-01-18 15:23:08,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:08,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:08,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:08,398 INFO L229 MonitoredProcess]: Starting monitored process 470 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:08,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Waiting until timeout for monitored process [2022-01-18 15:23:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:08,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:08,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:23:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:08,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:09,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:09,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:09,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206088451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:09,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:09,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:09,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18415139] [2022-01-18 15:23:09,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:09,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:09,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:09,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:09,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:09,113 INFO L87 Difference]: Start difference. First operand 298 states and 880 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:09,620 INFO L93 Difference]: Finished difference Result 637 states and 1794 transitions. [2022-01-18 15:23:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:09,620 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:09,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:09,621 INFO L225 Difference]: With dead ends: 637 [2022-01-18 15:23:09,621 INFO L226 Difference]: Without dead ends: 631 [2022-01-18 15:23:09,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:09,621 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 155 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:09,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 165 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:09,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-18 15:23:09,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2022-01-18 15:23:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.954397394136808) internal successors, (907), 307 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2022-01-18 15:23:09,625 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2022-01-18 15:23:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:09,625 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2022-01-18 15:23:09,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2022-01-18 15:23:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:09,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:09,626 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:09,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Ended with exit code 0 [2022-01-18 15:23:09,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,470 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:09,826 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:09,826 INFO L85 PathProgramCache]: Analyzing trace with hash -758399998, now seen corresponding path program 470 times [2022-01-18 15:23:09,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:09,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598757271] [2022-01-18 15:23:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:09,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:09,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:09,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598757271] [2022-01-18 15:23:09,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598757271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:09,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107969920] [2022-01-18 15:23:09,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:09,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:09,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:09,916 INFO L229 MonitoredProcess]: Starting monitored process 471 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:09,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Waiting until timeout for monitored process [2022-01-18 15:23:10,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:10,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:10,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:10,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:10,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:23:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:10,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:10,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:10,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:10,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107969920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:10,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:10,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:10,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843569874] [2022-01-18 15:23:10,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:10,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:10,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:10,663 INFO L87 Difference]: Start difference. First operand 308 states and 907 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:11,022 INFO L93 Difference]: Finished difference Result 608 states and 1740 transitions. [2022-01-18 15:23:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:11,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:11,023 INFO L225 Difference]: With dead ends: 608 [2022-01-18 15:23:11,023 INFO L226 Difference]: Without dead ends: 608 [2022-01-18 15:23:11,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:23:11,023 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:11,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 127 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:11,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-01-18 15:23:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 293. [2022-01-18 15:23:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2022-01-18 15:23:11,027 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2022-01-18 15:23:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:11,027 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2022-01-18 15:23:11,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2022-01-18 15:23:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:11,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:11,028 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:11,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:11,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,471 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:11,228 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:11,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1874390962, now seen corresponding path program 471 times [2022-01-18 15:23:11,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:11,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958631415] [2022-01-18 15:23:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:11,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:11,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:11,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958631415] [2022-01-18 15:23:11,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958631415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:11,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801702153] [2022-01-18 15:23:11,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:11,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:11,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:11,313 INFO L229 MonitoredProcess]: Starting monitored process 472 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:11,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Waiting until timeout for monitored process [2022-01-18 15:23:11,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:23:11,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:11,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:23:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:11,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:11,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:11,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:12,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801702153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:12,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:12,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:12,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989700073] [2022-01-18 15:23:12,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:12,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:12,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:12,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:12,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:12,107 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:12,372 INFO L93 Difference]: Finished difference Result 489 states and 1405 transitions. [2022-01-18 15:23:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:12,372 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:12,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:12,373 INFO L225 Difference]: With dead ends: 489 [2022-01-18 15:23:12,373 INFO L226 Difference]: Without dead ends: 489 [2022-01-18 15:23:12,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:23:12,373 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 111 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:12,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 150 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:12,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-18 15:23:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 301. [2022-01-18 15:23:12,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.986666666666667) internal successors, (896), 300 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2022-01-18 15:23:12,377 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2022-01-18 15:23:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:12,377 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2022-01-18 15:23:12,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2022-01-18 15:23:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:12,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:12,378 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:12,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:12,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,472 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:12,578 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:12,578 INFO L85 PathProgramCache]: Analyzing trace with hash -992313528, now seen corresponding path program 472 times [2022-01-18 15:23:12,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:12,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104620165] [2022-01-18 15:23:12,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:12,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:12,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:12,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104620165] [2022-01-18 15:23:12,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104620165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:12,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064697067] [2022-01-18 15:23:12,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:12,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:12,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:12,657 INFO L229 MonitoredProcess]: Starting monitored process 473 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:12,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Waiting until timeout for monitored process [2022-01-18 15:23:12,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:12,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:12,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:12,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:13,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:23:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:13,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:13,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:13,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:13,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064697067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:13,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:13,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:13,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630697646] [2022-01-18 15:23:13,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:13,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:13,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:13,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:13,418 INFO L87 Difference]: Start difference. First operand 301 states and 896 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:13,731 INFO L93 Difference]: Finished difference Result 495 states and 1412 transitions. [2022-01-18 15:23:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:23:13,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:13,732 INFO L225 Difference]: With dead ends: 495 [2022-01-18 15:23:13,732 INFO L226 Difference]: Without dead ends: 489 [2022-01-18 15:23:13,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:23:13,732 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:13,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 191 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-18 15:23:13,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 298. [2022-01-18 15:23:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2022-01-18 15:23:13,736 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2022-01-18 15:23:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:13,736 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2022-01-18 15:23:13,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2022-01-18 15:23:13,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:13,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:13,736 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:13,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Ended with exit code 0 [2022-01-18 15:23:13,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,473 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:13,937 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1527543330, now seen corresponding path program 473 times [2022-01-18 15:23:13,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:13,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94499113] [2022-01-18 15:23:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:13,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:14,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:14,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94499113] [2022-01-18 15:23:14,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94499113] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:14,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745193638] [2022-01-18 15:23:14,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:14,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:14,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:14,015 INFO L229 MonitoredProcess]: Starting monitored process 474 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:14,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Waiting until timeout for monitored process [2022-01-18 15:23:14,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:14,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:14,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:14,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:14,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:14,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:14,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:14,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:14,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745193638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:14,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:14,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:23:14,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704133747] [2022-01-18 15:23:14,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:14,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:14,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:14,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:14,767 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:14,995 INFO L93 Difference]: Finished difference Result 459 states and 1330 transitions. [2022-01-18 15:23:14,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:14,995 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:14,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:14,996 INFO L225 Difference]: With dead ends: 459 [2022-01-18 15:23:14,996 INFO L226 Difference]: Without dead ends: 447 [2022-01-18 15:23:14,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:23:14,996 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 79 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:14,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 113 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-18 15:23:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 295. [2022-01-18 15:23:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2022-01-18 15:23:15,000 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2022-01-18 15:23:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:15,000 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2022-01-18 15:23:15,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:15,000 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2022-01-18 15:23:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:15,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:15,000 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:15,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Ended with exit code 0 [2022-01-18 15:23:15,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2022-01-18 15:23:15,201 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:15,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:15,201 INFO L85 PathProgramCache]: Analyzing trace with hash -381410088, now seen corresponding path program 474 times [2022-01-18 15:23:15,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:15,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752172019] [2022-01-18 15:23:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:15,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:15,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:15,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752172019] [2022-01-18 15:23:15,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752172019] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:15,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14260837] [2022-01-18 15:23:15,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:15,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:15,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:15,288 INFO L229 MonitoredProcess]: Starting monitored process 475 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:15,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Waiting until timeout for monitored process [2022-01-18 15:23:15,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:23:15,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:15,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:15,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:15,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:23:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:15,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:16,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:16,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:16,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14260837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:16,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:16,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:16,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886539115] [2022-01-18 15:23:16,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:16,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:16,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:16,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:16,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:16,209 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:16,528 INFO L93 Difference]: Finished difference Result 576 states and 1623 transitions. [2022-01-18 15:23:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:16,528 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:16,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:16,529 INFO L225 Difference]: With dead ends: 576 [2022-01-18 15:23:16,529 INFO L226 Difference]: Without dead ends: 576 [2022-01-18 15:23:16,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:16,529 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:16,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 191 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:16,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-18 15:23:16,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 303. [2022-01-18 15:23:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.013245033112583) internal successors, (910), 302 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:16,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2022-01-18 15:23:16,533 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2022-01-18 15:23:16,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:16,533 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2022-01-18 15:23:16,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:16,533 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2022-01-18 15:23:16,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:16,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:16,534 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:16,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Ended with exit code 0 [2022-01-18 15:23:16,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 475 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2022-01-18 15:23:16,734 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:16,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash 500667346, now seen corresponding path program 475 times [2022-01-18 15:23:16,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:16,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157634642] [2022-01-18 15:23:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:16,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:16,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:16,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157634642] [2022-01-18 15:23:16,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157634642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:16,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167680849] [2022-01-18 15:23:16,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:16,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:16,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:16,816 INFO L229 MonitoredProcess]: Starting monitored process 476 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:16,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Waiting until timeout for monitored process [2022-01-18 15:23:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:17,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:17,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:17,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-01-18 15:23:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:17,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:17,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:17,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:17,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167680849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:17,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:17,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:17,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450628296] [2022-01-18 15:23:17,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:17,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:17,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:17,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:17,610 INFO L87 Difference]: Start difference. First operand 303 states and 910 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:18,023 INFO L93 Difference]: Finished difference Result 605 states and 1669 transitions. [2022-01-18 15:23:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:23:18,023 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:18,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:18,024 INFO L225 Difference]: With dead ends: 605 [2022-01-18 15:23:18,024 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 15:23:18,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:23:18,024 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 152 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:18,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 231 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:18,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 15:23:18,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 306. [2022-01-18 15:23:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9901639344262296) internal successors, (912), 305 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2022-01-18 15:23:18,028 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2022-01-18 15:23:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:18,028 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2022-01-18 15:23:18,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2022-01-18 15:23:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:18,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:18,028 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:18,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:18,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2022-01-18 15:23:18,229 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:18,229 INFO L85 PathProgramCache]: Analyzing trace with hash 359487246, now seen corresponding path program 476 times [2022-01-18 15:23:18,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:18,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610447587] [2022-01-18 15:23:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:18,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:18,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:18,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610447587] [2022-01-18 15:23:18,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610447587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:18,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730623288] [2022-01-18 15:23:18,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:18,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:18,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:18,319 INFO L229 MonitoredProcess]: Starting monitored process 477 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:18,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Waiting until timeout for monitored process [2022-01-18 15:23:18,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:18,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:18,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:18,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:18,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-01-18 15:23:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:18,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:19,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:19,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:19,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730623288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:19,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:19,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:19,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757140056] [2022-01-18 15:23:19,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:19,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:19,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:19,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:19,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:19,193 INFO L87 Difference]: Start difference. First operand 306 states and 912 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:19,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:19,398 INFO L93 Difference]: Finished difference Result 544 states and 1544 transitions. [2022-01-18 15:23:19,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:19,399 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:19,399 INFO L225 Difference]: With dead ends: 544 [2022-01-18 15:23:19,400 INFO L226 Difference]: Without dead ends: 544 [2022-01-18 15:23:19,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:23:19,400 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:19,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 128 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:19,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-18 15:23:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 299. [2022-01-18 15:23:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0) internal successors, (894), 298 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2022-01-18 15:23:19,404 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2022-01-18 15:23:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:19,404 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2022-01-18 15:23:19,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2022-01-18 15:23:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:19,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:19,404 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:19,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Ended with exit code 0 [2022-01-18 15:23:19,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2022-01-18 15:23:19,604 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:19,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1353862866, now seen corresponding path program 477 times [2022-01-18 15:23:19,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:19,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285292544] [2022-01-18 15:23:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:19,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:19,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:19,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285292544] [2022-01-18 15:23:19,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285292544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:19,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588855640] [2022-01-18 15:23:19,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:19,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:19,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:19,696 INFO L229 MonitoredProcess]: Starting monitored process 478 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:19,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Waiting until timeout for monitored process [2022-01-18 15:23:19,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:23:19,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:19,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:20,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:23:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:20,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:20,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:20,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:20,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588855640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:20,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:20,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:20,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111571307] [2022-01-18 15:23:20,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:20,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:20,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:20,491 INFO L87 Difference]: Start difference. First operand 299 states and 894 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:20,790 INFO L93 Difference]: Finished difference Result 573 states and 1604 transitions. [2022-01-18 15:23:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:20,790 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:20,791 INFO L225 Difference]: With dead ends: 573 [2022-01-18 15:23:20,791 INFO L226 Difference]: Without dead ends: 573 [2022-01-18 15:23:20,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:20,791 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 134 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:20,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 181 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-18 15:23:20,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 296. [2022-01-18 15:23:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9796610169491524) internal successors, (879), 295 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2022-01-18 15:23:20,795 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2022-01-18 15:23:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:20,795 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2022-01-18 15:23:20,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2022-01-18 15:23:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:20,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:20,795 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:20,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:20,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2022-01-18 15:23:20,996 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:20,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:20,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1960651298, now seen corresponding path program 478 times [2022-01-18 15:23:20,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:20,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255488408] [2022-01-18 15:23:20,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:20,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:21,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255488408] [2022-01-18 15:23:21,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255488408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467978107] [2022-01-18 15:23:21,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:21,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:21,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:21,078 INFO L229 MonitoredProcess]: Starting monitored process 479 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:21,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Waiting until timeout for monitored process [2022-01-18 15:23:21,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:21,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:21,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:21,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:21,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-01-18 15:23:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:21,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:21,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:21,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:21,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467978107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:21,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:21,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:21,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662654370] [2022-01-18 15:23:21,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:21,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:21,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:21,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:21,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:21,896 INFO L87 Difference]: Start difference. First operand 296 states and 879 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:22,223 INFO L93 Difference]: Finished difference Result 544 states and 1536 transitions. [2022-01-18 15:23:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:23:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:22,224 INFO L225 Difference]: With dead ends: 544 [2022-01-18 15:23:22,224 INFO L226 Difference]: Without dead ends: 538 [2022-01-18 15:23:22,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:22,225 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 172 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:22,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 142 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:22,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-18 15:23:22,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 306. [2022-01-18 15:23:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9704918032786884) internal successors, (906), 305 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2022-01-18 15:23:22,229 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2022-01-18 15:23:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:22,229 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2022-01-18 15:23:22,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2022-01-18 15:23:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:22,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:22,229 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:22,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Ended with exit code 0 [2022-01-18 15:23:22,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,479 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:22,430 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:22,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1936751384, now seen corresponding path program 479 times [2022-01-18 15:23:22,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:22,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793724136] [2022-01-18 15:23:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:22,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:22,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:22,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793724136] [2022-01-18 15:23:22,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793724136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:22,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29838280] [2022-01-18 15:23:22,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:22,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:22,516 INFO L229 MonitoredProcess]: Starting monitored process 480 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:22,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Waiting until timeout for monitored process [2022-01-18 15:23:22,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:23:22,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:22,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:22,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:22,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:23:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:23,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:23,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:23,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:23,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29838280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:23,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:23,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:23,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878973616] [2022-01-18 15:23:23,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:23,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:23,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:23,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:23,302 INFO L87 Difference]: Start difference. First operand 306 states and 906 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:23,607 INFO L93 Difference]: Finished difference Result 521 states and 1497 transitions. [2022-01-18 15:23:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:23,608 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:23,608 INFO L225 Difference]: With dead ends: 521 [2022-01-18 15:23:23,608 INFO L226 Difference]: Without dead ends: 521 [2022-01-18 15:23:23,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:23,609 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 142 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:23,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 137 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-01-18 15:23:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2022-01-18 15:23:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2022-01-18 15:23:23,612 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2022-01-18 15:23:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:23,612 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2022-01-18 15:23:23,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2022-01-18 15:23:23,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:23,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:23,613 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:23,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:23,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,480 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:23,813 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:23,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:23,813 INFO L85 PathProgramCache]: Analyzing trace with hash -519009966, now seen corresponding path program 480 times [2022-01-18 15:23:23,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:23,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846969948] [2022-01-18 15:23:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:23,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:23,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:23,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846969948] [2022-01-18 15:23:23,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846969948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:23,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64087732] [2022-01-18 15:23:23,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:23,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:23,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:23,917 INFO L229 MonitoredProcess]: Starting monitored process 481 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:23,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Waiting until timeout for monitored process [2022-01-18 15:23:24,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:23:24,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:24,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:24,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:24,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:24,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:24,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:24,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:24,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64087732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:24,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:24,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:23:24,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644432583] [2022-01-18 15:23:24,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:24,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:24,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:24,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:24,654 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:24,906 INFO L93 Difference]: Finished difference Result 461 states and 1334 transitions. [2022-01-18 15:23:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:24,906 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:24,906 INFO L225 Difference]: With dead ends: 461 [2022-01-18 15:23:24,906 INFO L226 Difference]: Without dead ends: 449 [2022-01-18 15:23:24,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:23:24,907 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:24,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 136 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:24,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-01-18 15:23:24,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 297. [2022-01-18 15:23:24,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2022-01-18 15:23:24,910 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2022-01-18 15:23:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:24,910 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2022-01-18 15:23:24,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2022-01-18 15:23:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:24,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:24,911 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:24,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Ended with exit code 0 [2022-01-18 15:23:25,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,481 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:25,111 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash 221887368, now seen corresponding path program 481 times [2022-01-18 15:23:25,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:25,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068708100] [2022-01-18 15:23:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:25,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:25,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:25,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068708100] [2022-01-18 15:23:25,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068708100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:25,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487752433] [2022-01-18 15:23:25,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:25,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:25,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:25,258 INFO L229 MonitoredProcess]: Starting monitored process 482 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:25,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Waiting until timeout for monitored process [2022-01-18 15:23:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:25,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:25,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:25,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:23:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:25,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:25,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:25,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:26,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487752433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:26,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:26,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:26,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861496053] [2022-01-18 15:23:26,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:26,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:26,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:26,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:26,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:26,039 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:26,369 INFO L93 Difference]: Finished difference Result 486 states and 1386 transitions. [2022-01-18 15:23:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:26,369 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:26,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:26,370 INFO L225 Difference]: With dead ends: 486 [2022-01-18 15:23:26,370 INFO L226 Difference]: Without dead ends: 480 [2022-01-18 15:23:26,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:23:26,370 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:26,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 183 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-18 15:23:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 307. [2022-01-18 15:23:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9607843137254903) internal successors, (906), 306 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2022-01-18 15:23:26,374 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2022-01-18 15:23:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:26,374 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2022-01-18 15:23:26,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2022-01-18 15:23:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:26,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:26,375 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:26,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Ended with exit code 0 [2022-01-18 15:23:26,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2022-01-18 15:23:26,575 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:26,575 INFO L85 PathProgramCache]: Analyzing trace with hash 245787282, now seen corresponding path program 482 times [2022-01-18 15:23:26,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:26,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724343351] [2022-01-18 15:23:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:26,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:26,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:26,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724343351] [2022-01-18 15:23:26,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724343351] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:26,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538656031] [2022-01-18 15:23:26,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:26,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:26,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:26,658 INFO L229 MonitoredProcess]: Starting monitored process 483 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:26,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Waiting until timeout for monitored process [2022-01-18 15:23:26,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:26,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:26,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:26,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:27,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:23:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:27,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:27,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:27,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:27,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538656031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:27,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:27,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:27,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413087732] [2022-01-18 15:23:27,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:27,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:27,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:27,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:27,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:27,464 INFO L87 Difference]: Start difference. First operand 307 states and 906 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:27,692 INFO L93 Difference]: Finished difference Result 457 states and 1332 transitions. [2022-01-18 15:23:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:27,692 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:27,693 INFO L225 Difference]: With dead ends: 457 [2022-01-18 15:23:27,693 INFO L226 Difference]: Without dead ends: 457 [2022-01-18 15:23:27,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:23:27,693 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 72 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:27,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 108 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-18 15:23:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 294. [2022-01-18 15:23:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2022-01-18 15:23:27,696 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2022-01-18 15:23:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:27,696 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2022-01-18 15:23:27,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2022-01-18 15:23:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:27,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:27,697 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:27,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:27,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,483 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:27,897 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1017876942, now seen corresponding path program 483 times [2022-01-18 15:23:27,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:27,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282102957] [2022-01-18 15:23:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:27,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:27,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:27,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282102957] [2022-01-18 15:23:27,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282102957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:27,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367642935] [2022-01-18 15:23:27,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:27,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:27,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:27,984 INFO L229 MonitoredProcess]: Starting monitored process 484 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:27,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Waiting until timeout for monitored process [2022-01-18 15:23:28,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:23:28,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:28,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:28,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:28,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:23:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:28,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:28,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:28,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:28,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367642935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:28,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:28,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:28,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429296614] [2022-01-18 15:23:28,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:28,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:28,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:28,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:28,758 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:29,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:29,045 INFO L93 Difference]: Finished difference Result 586 states and 1637 transitions. [2022-01-18 15:23:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:29,045 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:29,046 INFO L225 Difference]: With dead ends: 586 [2022-01-18 15:23:29,046 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 15:23:29,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:29,046 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 143 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:29,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 170 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:29,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 15:23:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 304. [2022-01-18 15:23:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0165016501650164) internal successors, (914), 303 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2022-01-18 15:23:29,050 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2022-01-18 15:23:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:29,050 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2022-01-18 15:23:29,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2022-01-18 15:23:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:29,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:29,051 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:29,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:29,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,484 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:29,263 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:29,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:29,263 INFO L85 PathProgramCache]: Analyzing trace with hash -135799508, now seen corresponding path program 484 times [2022-01-18 15:23:29,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:29,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866743270] [2022-01-18 15:23:29,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:29,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:29,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:29,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866743270] [2022-01-18 15:23:29,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866743270] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:29,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014229345] [2022-01-18 15:23:29,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:29,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:29,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:29,346 INFO L229 MonitoredProcess]: Starting monitored process 485 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:29,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Waiting until timeout for monitored process [2022-01-18 15:23:29,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:29,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:29,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:29,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:29,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:23:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:29,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:29,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:29,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:30,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014229345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:30,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:30,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:30,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620358452] [2022-01-18 15:23:30,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:30,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:30,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:30,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:30,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:30,053 INFO L87 Difference]: Start difference. First operand 304 states and 914 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:30,317 INFO L93 Difference]: Finished difference Result 563 states and 1580 transitions. [2022-01-18 15:23:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:23:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:30,318 INFO L225 Difference]: With dead ends: 563 [2022-01-18 15:23:30,318 INFO L226 Difference]: Without dead ends: 557 [2022-01-18 15:23:30,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:23:30,318 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 134 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:30,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 175 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-18 15:23:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 307. [2022-01-18 15:23:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2022-01-18 15:23:30,322 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2022-01-18 15:23:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:30,323 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2022-01-18 15:23:30,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2022-01-18 15:23:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:30,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:30,323 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:30,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Ended with exit code 0 [2022-01-18 15:23:30,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 485 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2022-01-18 15:23:30,523 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:30,524 INFO L85 PathProgramCache]: Analyzing trace with hash -276979608, now seen corresponding path program 485 times [2022-01-18 15:23:30,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:30,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010732743] [2022-01-18 15:23:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:30,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:30,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:30,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010732743] [2022-01-18 15:23:30,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010732743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:30,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460067373] [2022-01-18 15:23:30,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:30,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:30,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:30,612 INFO L229 MonitoredProcess]: Starting monitored process 486 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:30,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Waiting until timeout for monitored process [2022-01-18 15:23:30,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:23:30,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:30,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:31,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:23:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:31,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:31,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:31,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:31,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460067373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:31,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:31,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:31,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681479530] [2022-01-18 15:23:31,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:31,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:31,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:31,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:31,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:31,345 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:31,646 INFO L93 Difference]: Finished difference Result 592 states and 1677 transitions. [2022-01-18 15:23:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:31,646 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:31,647 INFO L225 Difference]: With dead ends: 592 [2022-01-18 15:23:31,647 INFO L226 Difference]: Without dead ends: 592 [2022-01-18 15:23:31,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:31,647 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 148 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:31,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 169 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-18 15:23:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 310. [2022-01-18 15:23:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.01294498381877) internal successors, (931), 309 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2022-01-18 15:23:31,651 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2022-01-18 15:23:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:31,652 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2022-01-18 15:23:31,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2022-01-18 15:23:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:31,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:31,652 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:31,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Ended with exit code 0 [2022-01-18 15:23:31,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2022-01-18 15:23:31,852 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash 717396012, now seen corresponding path program 486 times [2022-01-18 15:23:31,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:31,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061692620] [2022-01-18 15:23:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:31,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:31,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:31,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061692620] [2022-01-18 15:23:31,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061692620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:31,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659197411] [2022-01-18 15:23:31,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:31,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:31,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:31,944 INFO L229 MonitoredProcess]: Starting monitored process 487 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:31,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Waiting until timeout for monitored process [2022-01-18 15:23:32,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:23:32,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:32,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:32,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:32,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:23:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:32,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:32,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:32,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:32,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659197411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:32,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:32,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:32,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036638200] [2022-01-18 15:23:32,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:32,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:32,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:32,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:32,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:32,718 INFO L87 Difference]: Start difference. First operand 310 states and 931 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:33,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:33,142 INFO L93 Difference]: Finished difference Result 621 states and 1737 transitions. [2022-01-18 15:23:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:23:33,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:33,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:33,143 INFO L225 Difference]: With dead ends: 621 [2022-01-18 15:23:33,143 INFO L226 Difference]: Without dead ends: 621 [2022-01-18 15:23:33,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:23:33,143 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 179 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:33,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 204 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:33,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-18 15:23:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 307. [2022-01-18 15:23:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2022-01-18 15:23:33,147 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2022-01-18 15:23:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:33,148 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2022-01-18 15:23:33,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2022-01-18 15:23:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:33,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:33,148 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:33,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Ended with exit code 0 [2022-01-18 15:23:33,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2022-01-18 15:23:33,348 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:33,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1697849144, now seen corresponding path program 487 times [2022-01-18 15:23:33,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:33,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122328733] [2022-01-18 15:23:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:33,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:33,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:33,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122328733] [2022-01-18 15:23:33,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122328733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:33,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360063502] [2022-01-18 15:23:33,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:33,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:33,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:33,429 INFO L229 MonitoredProcess]: Starting monitored process 488 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:33,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Waiting until timeout for monitored process [2022-01-18 15:23:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:33,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:33,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:33,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:23:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:33,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:34,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:34,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:34,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360063502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:34,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:34,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:34,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630372320] [2022-01-18 15:23:34,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:34,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:34,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:34,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:34,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:34,139 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:34,450 INFO L93 Difference]: Finished difference Result 580 states and 1629 transitions. [2022-01-18 15:23:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:34,450 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:34,451 INFO L225 Difference]: With dead ends: 580 [2022-01-18 15:23:34,451 INFO L226 Difference]: Without dead ends: 574 [2022-01-18 15:23:34,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:23:34,451 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 145 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:34,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 175 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-18 15:23:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 311. [2022-01-18 15:23:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2022-01-18 15:23:34,455 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2022-01-18 15:23:34,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:34,455 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2022-01-18 15:23:34,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:34,455 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2022-01-18 15:23:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:34,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:34,456 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:34,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Ended with exit code 0 [2022-01-18 15:23:34,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2022-01-18 15:23:34,656 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1721749058, now seen corresponding path program 488 times [2022-01-18 15:23:34,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:34,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302993951] [2022-01-18 15:23:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:34,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:34,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302993951] [2022-01-18 15:23:34,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302993951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704100206] [2022-01-18 15:23:34,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:34,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:34,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:34,741 INFO L229 MonitoredProcess]: Starting monitored process 489 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:34,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Waiting until timeout for monitored process [2022-01-18 15:23:34,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:34,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:34,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:34,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:35,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:23:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:35,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:35,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:35,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:35,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704100206] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:35,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:35,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:35,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943764109] [2022-01-18 15:23:35,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:35,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:35,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:35,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:35,463 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:35,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:35,832 INFO L93 Difference]: Finished difference Result 586 states and 1650 transitions. [2022-01-18 15:23:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:23:35,833 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:35,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:35,833 INFO L225 Difference]: With dead ends: 586 [2022-01-18 15:23:35,833 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 15:23:35,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:23:35,834 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 138 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:35,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 218 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 15:23:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 308. [2022-01-18 15:23:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.996742671009772) internal successors, (920), 307 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2022-01-18 15:23:35,838 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2022-01-18 15:23:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:35,838 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2022-01-18 15:23:35,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2022-01-18 15:23:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:35,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:35,838 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:35,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Ended with exit code 0 [2022-01-18 15:23:36,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,489 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:36,039 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:36,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1544436786, now seen corresponding path program 489 times [2022-01-18 15:23:36,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:36,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954024299] [2022-01-18 15:23:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:36,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:36,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:36,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954024299] [2022-01-18 15:23:36,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954024299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:36,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967032004] [2022-01-18 15:23:36,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:36,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:36,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:36,130 INFO L229 MonitoredProcess]: Starting monitored process 490 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:36,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Waiting until timeout for monitored process [2022-01-18 15:23:36,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:23:36,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:36,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:36,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:36,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-01-18 15:23:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:36,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:36,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:36,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:36,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967032004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:36,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:36,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:36,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641936307] [2022-01-18 15:23:36,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:36,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:36,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:36,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:36,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:36,893 INFO L87 Difference]: Start difference. First operand 308 states and 920 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:37,089 INFO L93 Difference]: Finished difference Result 516 states and 1495 transitions. [2022-01-18 15:23:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:37,089 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:37,090 INFO L225 Difference]: With dead ends: 516 [2022-01-18 15:23:37,090 INFO L226 Difference]: Without dead ends: 516 [2022-01-18 15:23:37,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:23:37,090 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 122 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:37,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 132 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-01-18 15:23:37,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 309. [2022-01-18 15:23:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9935064935064934) internal successors, (922), 308 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2022-01-18 15:23:37,094 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2022-01-18 15:23:37,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:37,094 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2022-01-18 15:23:37,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2022-01-18 15:23:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:37,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:37,094 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:37,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Ended with exit code 0 [2022-01-18 15:23:37,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,490 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:37,295 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:37,295 INFO L85 PathProgramCache]: Analyzing trace with hash -550061166, now seen corresponding path program 490 times [2022-01-18 15:23:37,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:37,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198184900] [2022-01-18 15:23:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:37,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:37,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:37,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198184900] [2022-01-18 15:23:37,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198184900] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:37,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044868794] [2022-01-18 15:23:37,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:37,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:37,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:37,397 INFO L229 MonitoredProcess]: Starting monitored process 491 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:37,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Waiting until timeout for monitored process [2022-01-18 15:23:37,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:37,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:37,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:37,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:37,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:23:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:37,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:38,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:38,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:38,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044868794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:38,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:38,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:38,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995641565] [2022-01-18 15:23:38,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:38,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:38,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:38,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:38,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:38,095 INFO L87 Difference]: Start difference. First operand 309 states and 922 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:38,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:38,459 INFO L93 Difference]: Finished difference Result 537 states and 1533 transitions. [2022-01-18 15:23:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:38,460 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:38,460 INFO L225 Difference]: With dead ends: 537 [2022-01-18 15:23:38,460 INFO L226 Difference]: Without dead ends: 537 [2022-01-18 15:23:38,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:23:38,461 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 130 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:38,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 224 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:38,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-18 15:23:38,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 298. [2022-01-18 15:23:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2022-01-18 15:23:38,464 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2022-01-18 15:23:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:38,465 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2022-01-18 15:23:38,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2022-01-18 15:23:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:38,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:38,465 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:38,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Ended with exit code 0 [2022-01-18 15:23:38,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 491 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2022-01-18 15:23:38,665 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:38,666 INFO L85 PathProgramCache]: Analyzing trace with hash -845488348, now seen corresponding path program 491 times [2022-01-18 15:23:38,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:38,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059395568] [2022-01-18 15:23:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:38,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:38,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:38,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059395568] [2022-01-18 15:23:38,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059395568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:38,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817802196] [2022-01-18 15:23:38,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:38,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:38,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:38,750 INFO L229 MonitoredProcess]: Starting monitored process 492 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:38,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Waiting until timeout for monitored process [2022-01-18 15:23:39,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:39,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:39,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:39,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:39,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:39,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:39,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:39,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817802196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:39,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:39,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:39,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778497346] [2022-01-18 15:23:39,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:39,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:39,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:39,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:39,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:39,442 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:39,648 INFO L93 Difference]: Finished difference Result 459 states and 1340 transitions. [2022-01-18 15:23:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:39,648 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:39,648 INFO L225 Difference]: With dead ends: 459 [2022-01-18 15:23:39,648 INFO L226 Difference]: Without dead ends: 459 [2022-01-18 15:23:39,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:23:39,649 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:39,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 129 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-18 15:23:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 295. [2022-01-18 15:23:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9693877551020407) internal successors, (873), 294 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2022-01-18 15:23:39,652 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2022-01-18 15:23:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:39,652 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2022-01-18 15:23:39,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2022-01-18 15:23:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:39,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:39,653 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:39,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Ended with exit code 0 [2022-01-18 15:23:39,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,492 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:39,853 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:39,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:39,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1682036664, now seen corresponding path program 492 times [2022-01-18 15:23:39,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:39,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618286639] [2022-01-18 15:23:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:39,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:39,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618286639] [2022-01-18 15:23:39,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618286639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760084750] [2022-01-18 15:23:39,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:39,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:39,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:39,933 INFO L229 MonitoredProcess]: Starting monitored process 493 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:39,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Waiting until timeout for monitored process [2022-01-18 15:23:40,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:23:40,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:40,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:40,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:40,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:40,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:40,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:40,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:40,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760084750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:40,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:40,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:40,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452396275] [2022-01-18 15:23:40,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:40,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:40,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:40,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:40,601 INFO L87 Difference]: Start difference. First operand 295 states and 873 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:40,829 INFO L93 Difference]: Finished difference Result 504 states and 1434 transitions. [2022-01-18 15:23:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:40,829 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:40,830 INFO L225 Difference]: With dead ends: 504 [2022-01-18 15:23:40,830 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 15:23:40,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:23:40,830 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:40,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 162 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:40,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 15:23:40,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 309. [2022-01-18 15:23:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.961038961038961) internal successors, (912), 308 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2022-01-18 15:23:40,834 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2022-01-18 15:23:40,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:40,834 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2022-01-18 15:23:40,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2022-01-18 15:23:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:40,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:40,834 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:40,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:41,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,493 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:41,035 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:41,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1658136750, now seen corresponding path program 493 times [2022-01-18 15:23:41,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:41,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643998124] [2022-01-18 15:23:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:41,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:41,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:41,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643998124] [2022-01-18 15:23:41,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643998124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:41,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827493765] [2022-01-18 15:23:41,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:41,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:41,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:41,119 INFO L229 MonitoredProcess]: Starting monitored process 494 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:41,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Waiting until timeout for monitored process [2022-01-18 15:23:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:41,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:41,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:41,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:41,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:41,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:41,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:41,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827493765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:41,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:41,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:23:41,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630207015] [2022-01-18 15:23:41,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:41,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:23:41,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:41,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:23:41,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:41,824 INFO L87 Difference]: Start difference. First operand 309 states and 912 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:42,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:42,071 INFO L93 Difference]: Finished difference Result 510 states and 1455 transitions. [2022-01-18 15:23:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:23:42,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:42,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:42,072 INFO L225 Difference]: With dead ends: 510 [2022-01-18 15:23:42,072 INFO L226 Difference]: Without dead ends: 510 [2022-01-18 15:23:42,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:23:42,072 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:42,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 173 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-18 15:23:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 307. [2022-01-18 15:23:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9640522875816995) internal successors, (907), 306 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2022-01-18 15:23:42,076 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2022-01-18 15:23:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:42,076 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2022-01-18 15:23:42,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2022-01-18 15:23:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:42,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:42,076 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:42,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Ended with exit code 0 [2022-01-18 15:23:42,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,494 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:42,276 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash -175001812, now seen corresponding path program 494 times [2022-01-18 15:23:42,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:42,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712915322] [2022-01-18 15:23:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:42,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:42,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:42,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712915322] [2022-01-18 15:23:42,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712915322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:42,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129723989] [2022-01-18 15:23:42,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:42,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:42,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:42,357 INFO L229 MonitoredProcess]: Starting monitored process 495 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:42,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Waiting until timeout for monitored process [2022-01-18 15:23:42,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:42,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:42,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:42,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:42,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:42,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:42,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:42,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129723989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:42,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:42,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:42,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013280731] [2022-01-18 15:23:42,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:42,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:42,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:42,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:42,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:42,994 INFO L87 Difference]: Start difference. First operand 307 states and 907 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:43,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:43,206 INFO L93 Difference]: Finished difference Result 479 states and 1390 transitions. [2022-01-18 15:23:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:43,206 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:43,207 INFO L225 Difference]: With dead ends: 479 [2022-01-18 15:23:43,207 INFO L226 Difference]: Without dead ends: 479 [2022-01-18 15:23:43,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:23:43,207 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:43,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 134 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-18 15:23:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 294. [2022-01-18 15:23:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2022-01-18 15:23:43,211 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2022-01-18 15:23:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:43,211 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2022-01-18 15:23:43,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2022-01-18 15:23:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:43,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:43,212 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:43,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:43,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2022-01-18 15:23:43,412 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:43,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:43,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2078712386, now seen corresponding path program 495 times [2022-01-18 15:23:43,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:43,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465373699] [2022-01-18 15:23:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:43,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:43,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:43,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465373699] [2022-01-18 15:23:43,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465373699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:43,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798591285] [2022-01-18 15:23:43,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:43,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:43,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:43,488 INFO L229 MonitoredProcess]: Starting monitored process 496 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:43,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Waiting until timeout for monitored process [2022-01-18 15:23:43,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:23:43,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:43,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:43,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:43,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:43,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:43,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:43,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:44,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798591285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:44,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:44,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:23:44,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574642522] [2022-01-18 15:23:44,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:44,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:23:44,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:44,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:23:44,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:23:44,119 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:44,339 INFO L93 Difference]: Finished difference Result 451 states and 1306 transitions. [2022-01-18 15:23:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:44,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:44,339 INFO L225 Difference]: With dead ends: 451 [2022-01-18 15:23:44,339 INFO L226 Difference]: Without dead ends: 439 [2022-01-18 15:23:44,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:44,340 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:44,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 148 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:44,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-18 15:23:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 298. [2022-01-18 15:23:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.95959595959596) internal successors, (879), 297 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2022-01-18 15:23:44,343 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2022-01-18 15:23:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:44,343 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2022-01-18 15:23:44,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2022-01-18 15:23:44,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:44,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:44,344 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:44,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:44,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2022-01-18 15:23:44,544 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:44,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:44,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1475357576, now seen corresponding path program 496 times [2022-01-18 15:23:44,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:44,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833450378] [2022-01-18 15:23:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:44,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:44,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:44,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833450378] [2022-01-18 15:23:44,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833450378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:44,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407109044] [2022-01-18 15:23:44,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:44,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:44,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:44,616 INFO L229 MonitoredProcess]: Starting monitored process 497 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:44,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Waiting until timeout for monitored process [2022-01-18 15:23:44,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:44,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:44,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:44,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:45,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:23:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:45,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:45,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:45,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:45,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407109044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:45,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:45,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:23:45,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13568031] [2022-01-18 15:23:45,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:45,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:45,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:45,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:45,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:45,272 INFO L87 Difference]: Start difference. First operand 298 states and 879 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:45,490 INFO L93 Difference]: Finished difference Result 476 states and 1358 transitions. [2022-01-18 15:23:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:45,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:45,491 INFO L225 Difference]: With dead ends: 476 [2022-01-18 15:23:45,491 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 15:23:45,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:23:45,492 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 111 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:45,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 119 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:45,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 15:23:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 308. [2022-01-18 15:23:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.95114006514658) internal successors, (906), 307 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2022-01-18 15:23:45,495 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2022-01-18 15:23:45,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:45,495 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2022-01-18 15:23:45,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:45,495 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2022-01-18 15:23:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:45,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:45,496 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:45,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Ended with exit code 0 [2022-01-18 15:23:45,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2022-01-18 15:23:45,696 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:45,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:45,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1451457662, now seen corresponding path program 497 times [2022-01-18 15:23:45,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:45,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516398417] [2022-01-18 15:23:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:45,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:45,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:45,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516398417] [2022-01-18 15:23:45,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516398417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:45,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095937018] [2022-01-18 15:23:45,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:45,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:45,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:45,772 INFO L229 MonitoredProcess]: Starting monitored process 498 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:45,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Waiting until timeout for monitored process [2022-01-18 15:23:46,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:23:46,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:46,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:46,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:46,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:23:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:46,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:46,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:46,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:46,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095937018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:46,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:46,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:46,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385424737] [2022-01-18 15:23:46,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:46,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:46,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:46,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:46,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:46,459 INFO L87 Difference]: Start difference. First operand 308 states and 906 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:46,624 INFO L93 Difference]: Finished difference Result 447 states and 1304 transitions. [2022-01-18 15:23:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:46,624 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:46,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:46,625 INFO L225 Difference]: With dead ends: 447 [2022-01-18 15:23:46,625 INFO L226 Difference]: Without dead ends: 447 [2022-01-18 15:23:46,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:23:46,625 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:46,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 100 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:46,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-18 15:23:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 296. [2022-01-18 15:23:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9627118644067796) internal successors, (874), 295 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2022-01-18 15:23:46,629 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2022-01-18 15:23:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:46,629 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2022-01-18 15:23:46,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2022-01-18 15:23:46,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:46,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:46,629 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:46,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Ended with exit code 0 [2022-01-18 15:23:46,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498,498 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:46,830 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:46,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1552152542, now seen corresponding path program 498 times [2022-01-18 15:23:46,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:46,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683332785] [2022-01-18 15:23:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:46,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:46,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:46,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683332785] [2022-01-18 15:23:46,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683332785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:46,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926613625] [2022-01-18 15:23:46,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:46,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:46,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:46,901 INFO L229 MonitoredProcess]: Starting monitored process 499 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:46,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Waiting until timeout for monitored process [2022-01-18 15:23:47,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:23:47,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:47,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:47,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:47,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:47,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:47,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:47,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926613625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:47,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:47,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:23:47,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781516034] [2022-01-18 15:23:47,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:47,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:47,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:47,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:47,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:47,508 INFO L87 Difference]: Start difference. First operand 296 states and 874 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:47,741 INFO L93 Difference]: Finished difference Result 482 states and 1373 transitions. [2022-01-18 15:23:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:47,742 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:47,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:47,742 INFO L225 Difference]: With dead ends: 482 [2022-01-18 15:23:47,742 INFO L226 Difference]: Without dead ends: 476 [2022-01-18 15:23:47,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:23:47,742 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:47,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 197 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:47,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-18 15:23:47,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 310. [2022-01-18 15:23:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.954692556634304) internal successors, (913), 309 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2022-01-18 15:23:47,746 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2022-01-18 15:23:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:47,746 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2022-01-18 15:23:47,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2022-01-18 15:23:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:47,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:47,747 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:47,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:47,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2022-01-18 15:23:47,947 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:47,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:47,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1576052456, now seen corresponding path program 499 times [2022-01-18 15:23:47,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:47,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085406371] [2022-01-18 15:23:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:47,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:48,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:48,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085406371] [2022-01-18 15:23:48,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085406371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:48,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057645036] [2022-01-18 15:23:48,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:48,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:48,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:48,020 INFO L229 MonitoredProcess]: Starting monitored process 500 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:48,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Waiting until timeout for monitored process [2022-01-18 15:23:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:48,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:48,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:48,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:48,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:48,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:48,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:48,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057645036] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:48,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:48,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:23:48,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641175030] [2022-01-18 15:23:48,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:48,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:23:48,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:48,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:23:48,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:48,623 INFO L87 Difference]: Start difference. First operand 310 states and 913 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:48,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:48,845 INFO L93 Difference]: Finished difference Result 482 states and 1379 transitions. [2022-01-18 15:23:48,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:23:48,845 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:48,846 INFO L225 Difference]: With dead ends: 482 [2022-01-18 15:23:48,846 INFO L226 Difference]: Without dead ends: 482 [2022-01-18 15:23:48,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:23:48,846 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:48,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 184 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-18 15:23:48,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 308. [2022-01-18 15:23:48,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.957654723127036) internal successors, (908), 307 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2022-01-18 15:23:48,850 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2022-01-18 15:23:48,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:48,850 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2022-01-18 15:23:48,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2022-01-18 15:23:48,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:48,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:48,850 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:48,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Ended with exit code 0 [2022-01-18 15:23:49,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,500 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:49,051 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:49,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1235779902, now seen corresponding path program 500 times [2022-01-18 15:23:49,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:49,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325290584] [2022-01-18 15:23:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:49,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:49,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:49,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325290584] [2022-01-18 15:23:49,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325290584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:49,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772679198] [2022-01-18 15:23:49,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:49,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:49,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:49,124 INFO L229 MonitoredProcess]: Starting monitored process 501 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:49,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Waiting until timeout for monitored process [2022-01-18 15:23:49,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:49,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:49,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:49,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:49,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:49,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:49,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:49,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772679198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:49,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:49,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:23:49,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006696673] [2022-01-18 15:23:49,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:49,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:49,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:49,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:49,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:49,688 INFO L87 Difference]: Start difference. First operand 308 states and 908 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:49,856 INFO L93 Difference]: Finished difference Result 457 states and 1329 transitions. [2022-01-18 15:23:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:49,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:49,856 INFO L225 Difference]: With dead ends: 457 [2022-01-18 15:23:49,856 INFO L226 Difference]: Without dead ends: 457 [2022-01-18 15:23:49,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:23:49,857 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:49,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 114 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-18 15:23:49,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 293. [2022-01-18 15:23:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2022-01-18 15:23:49,860 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2022-01-18 15:23:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:49,860 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2022-01-18 15:23:49,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2022-01-18 15:23:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:49,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:49,861 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:49,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Ended with exit code 0 [2022-01-18 15:23:50,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2022-01-18 15:23:50,061 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:50,061 INFO L85 PathProgramCache]: Analyzing trace with hash 106913962, now seen corresponding path program 501 times [2022-01-18 15:23:50,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:50,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421690638] [2022-01-18 15:23:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:50,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:50,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:50,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421690638] [2022-01-18 15:23:50,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421690638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:50,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904002299] [2022-01-18 15:23:50,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:50,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:50,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:50,123 INFO L229 MonitoredProcess]: Starting monitored process 502 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:50,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Waiting until timeout for monitored process [2022-01-18 15:23:50,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:23:50,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:50,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:50,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:50,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:50,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:50,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:50,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904002299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:50,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:50,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:23:50,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870324411] [2022-01-18 15:23:50,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:50,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:23:50,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:50,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:23:50,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:23:50,685 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:50,917 INFO L93 Difference]: Finished difference Result 529 states and 1491 transitions. [2022-01-18 15:23:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:50,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:50,918 INFO L225 Difference]: With dead ends: 529 [2022-01-18 15:23:50,918 INFO L226 Difference]: Without dead ends: 511 [2022-01-18 15:23:50,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:23:50,918 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:50,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 134 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:50,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-18 15:23:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 297. [2022-01-18 15:23:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.956081081081081) internal successors, (875), 296 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2022-01-18 15:23:50,922 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2022-01-18 15:23:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:50,922 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2022-01-18 15:23:50,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2022-01-18 15:23:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:50,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:50,922 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:50,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Ended with exit code 0 [2022-01-18 15:23:51,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2022-01-18 15:23:51,123 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1696784338, now seen corresponding path program 502 times [2022-01-18 15:23:51,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:51,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407443267] [2022-01-18 15:23:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:51,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:51,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:51,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407443267] [2022-01-18 15:23:51,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407443267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:51,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845507032] [2022-01-18 15:23:51,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:51,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:51,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:51,188 INFO L229 MonitoredProcess]: Starting monitored process 503 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:51,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Waiting until timeout for monitored process [2022-01-18 15:23:51,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:51,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:51,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:51,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:51,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:51,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:51,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:51,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:51,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845507032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:51,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:51,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:23:51,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894890775] [2022-01-18 15:23:51,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:51,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:23:51,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:51,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:23:51,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:23:51,775 INFO L87 Difference]: Start difference. First operand 297 states and 875 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:51,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:51,996 INFO L93 Difference]: Finished difference Result 525 states and 1483 transitions. [2022-01-18 15:23:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:51,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:51,997 INFO L225 Difference]: With dead ends: 525 [2022-01-18 15:23:51,997 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 15:23:51,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:51,997 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:51,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 128 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:51,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 15:23:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 299. [2022-01-18 15:23:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.953020134228188) internal successors, (880), 298 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2022-01-18 15:23:52,001 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2022-01-18 15:23:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:52,001 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2022-01-18 15:23:52,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2022-01-18 15:23:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:52,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:52,002 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:52,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Ended with exit code 0 [2022-01-18 15:23:52,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,503 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:52,202 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:52,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1857285624, now seen corresponding path program 503 times [2022-01-18 15:23:52,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:52,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531566161] [2022-01-18 15:23:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:52,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:52,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:52,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531566161] [2022-01-18 15:23:52,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531566161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:52,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311377784] [2022-01-18 15:23:52,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:52,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:52,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:52,267 INFO L229 MonitoredProcess]: Starting monitored process 504 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:52,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Waiting until timeout for monitored process [2022-01-18 15:23:52,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:52,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:52,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:52,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:52,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:23:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:52,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:52,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:52,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:52,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311377784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:52,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:52,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:23:52,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351935650] [2022-01-18 15:23:52,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:52,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:23:52,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:23:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:23:52,904 INFO L87 Difference]: Start difference. First operand 299 states and 880 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:53,267 INFO L93 Difference]: Finished difference Result 550 states and 1535 transitions. [2022-01-18 15:23:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:53,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:53,268 INFO L225 Difference]: With dead ends: 550 [2022-01-18 15:23:53,268 INFO L226 Difference]: Without dead ends: 544 [2022-01-18 15:23:53,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:23:53,268 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 100 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:53,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 194 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:23:53,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-18 15:23:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 309. [2022-01-18 15:23:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-01-18 15:23:53,272 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2022-01-18 15:23:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:53,272 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-01-18 15:23:53,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-01-18 15:23:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:53,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:53,273 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:53,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Ended with exit code 0 [2022-01-18 15:23:53,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,504 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:53,473 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:53,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1833385710, now seen corresponding path program 504 times [2022-01-18 15:23:53,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:53,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318263148] [2022-01-18 15:23:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:53,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:53,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:53,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318263148] [2022-01-18 15:23:53,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318263148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:53,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975704098] [2022-01-18 15:23:53,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:23:53,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:53,543 INFO L229 MonitoredProcess]: Starting monitored process 505 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:53,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Waiting until timeout for monitored process [2022-01-18 15:23:53,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:23:53,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:53,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:53,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:53,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:23:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:54,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:54,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:54,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:54,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975704098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:54,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:54,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:23:54,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573855609] [2022-01-18 15:23:54,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:54,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:23:54,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:54,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:23:54,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:23:54,196 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:54,440 INFO L93 Difference]: Finished difference Result 521 states and 1481 transitions. [2022-01-18 15:23:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:54,440 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:54,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:54,441 INFO L225 Difference]: With dead ends: 521 [2022-01-18 15:23:54,441 INFO L226 Difference]: Without dead ends: 521 [2022-01-18 15:23:54,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:23:54,441 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:54,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 141 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-01-18 15:23:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2022-01-18 15:23:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9591836734693877) internal successors, (870), 294 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2022-01-18 15:23:54,445 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2022-01-18 15:23:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:54,445 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2022-01-18 15:23:54,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2022-01-18 15:23:54,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:54,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:54,445 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:54,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Ended with exit code 0 [2022-01-18 15:23:54,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,505 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:54,646 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1272473102, now seen corresponding path program 505 times [2022-01-18 15:23:54,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:54,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162058529] [2022-01-18 15:23:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:54,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:54,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162058529] [2022-01-18 15:23:54,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162058529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604425814] [2022-01-18 15:23:54,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:23:54,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:54,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:54,709 INFO L229 MonitoredProcess]: Starting monitored process 506 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:54,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Waiting until timeout for monitored process [2022-01-18 15:23:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:54,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:54,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:55,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:55,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:55,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:55,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:55,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604425814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:55,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:55,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:23:55,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163519776] [2022-01-18 15:23:55,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:55,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:23:55,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:55,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:23:55,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:23:55,305 INFO L87 Difference]: Start difference. First operand 295 states and 870 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:55,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:55,479 INFO L93 Difference]: Finished difference Result 470 states and 1352 transitions. [2022-01-18 15:23:55,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:55,480 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:55,480 INFO L225 Difference]: With dead ends: 470 [2022-01-18 15:23:55,480 INFO L226 Difference]: Without dead ends: 458 [2022-01-18 15:23:55,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:23:55,481 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:55,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 104 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-01-18 15:23:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 299. [2022-01-18 15:23:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.953020134228188) internal successors, (880), 298 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2022-01-18 15:23:55,484 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2022-01-18 15:23:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:55,484 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2022-01-18 15:23:55,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:55,484 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2022-01-18 15:23:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:55,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:55,485 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:55,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:55,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,506 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:55,685 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:55,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2013370436, now seen corresponding path program 506 times [2022-01-18 15:23:55,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:55,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561466333] [2022-01-18 15:23:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:55,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:55,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:55,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561466333] [2022-01-18 15:23:55,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561466333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:55,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602323596] [2022-01-18 15:23:55,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:23:55,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:55,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:55,748 INFO L229 MonitoredProcess]: Starting monitored process 507 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:55,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Waiting until timeout for monitored process [2022-01-18 15:23:56,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:23:56,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:56,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:56,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:56,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:23:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:56,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:56,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:56,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:56,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602323596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:56,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:56,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:23:56,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287094740] [2022-01-18 15:23:56,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:56,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:23:56,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:23:56,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:23:56,370 INFO L87 Difference]: Start difference. First operand 299 states and 880 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:56,624 INFO L93 Difference]: Finished difference Result 495 states and 1404 transitions. [2022-01-18 15:23:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:23:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:56,625 INFO L225 Difference]: With dead ends: 495 [2022-01-18 15:23:56,625 INFO L226 Difference]: Without dead ends: 489 [2022-01-18 15:23:56,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:23:56,625 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 90 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:56,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 160 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:56,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-18 15:23:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 309. [2022-01-18 15:23:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-01-18 15:23:56,629 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2022-01-18 15:23:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:56,629 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-01-18 15:23:56,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-01-18 15:23:56,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:56,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:56,629 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:56,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Ended with exit code 0 [2022-01-18 15:23:56,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2022-01-18 15:23:56,829 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:56,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:56,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2037270350, now seen corresponding path program 507 times [2022-01-18 15:23:56,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:56,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956849932] [2022-01-18 15:23:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:56,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:56,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:56,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956849932] [2022-01-18 15:23:56,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956849932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:56,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438047989] [2022-01-18 15:23:56,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:23:56,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:56,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:56,895 INFO L229 MonitoredProcess]: Starting monitored process 508 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:56,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Waiting until timeout for monitored process [2022-01-18 15:23:57,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:23:57,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:57,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:57,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:57,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:23:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:57,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:57,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:57,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:23:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:57,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438047989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:57,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:57,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:23:57,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627987562] [2022-01-18 15:23:57,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:57,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:23:57,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:23:57,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:23:57,525 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:57,699 INFO L93 Difference]: Finished difference Result 466 states and 1350 transitions. [2022-01-18 15:23:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:57,699 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:57,700 INFO L225 Difference]: With dead ends: 466 [2022-01-18 15:23:57,700 INFO L226 Difference]: Without dead ends: 466 [2022-01-18 15:23:57,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:23:57,700 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:57,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 116 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-18 15:23:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 297. [2022-01-18 15:23:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.956081081081081) internal successors, (875), 296 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2022-01-18 15:23:57,704 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2022-01-18 15:23:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:57,704 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2022-01-18 15:23:57,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2022-01-18 15:23:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:57,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:57,704 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:57,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Ended with exit code 0 [2022-01-18 15:23:57,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,508 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:57,904 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:57,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:57,905 INFO L85 PathProgramCache]: Analyzing trace with hash 745913258, now seen corresponding path program 508 times [2022-01-18 15:23:57,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:57,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393370708] [2022-01-18 15:23:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:57,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:57,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:57,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393370708] [2022-01-18 15:23:57,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393370708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:57,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290105813] [2022-01-18 15:23:57,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:23:57,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:57,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:57,969 INFO L229 MonitoredProcess]: Starting monitored process 509 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:57,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Waiting until timeout for monitored process [2022-01-18 15:23:58,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:23:58,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:58,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:58,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:58,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:58,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:58,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:58,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:58,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290105813] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:58,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:58,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:23:58,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447543500] [2022-01-18 15:23:58,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:58,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:23:58,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:23:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:23:58,528 INFO L87 Difference]: Start difference. First operand 297 states and 875 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:58,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:58,701 INFO L93 Difference]: Finished difference Result 501 states and 1419 transitions. [2022-01-18 15:23:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:23:58,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:58,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:58,701 INFO L225 Difference]: With dead ends: 501 [2022-01-18 15:23:58,701 INFO L226 Difference]: Without dead ends: 495 [2022-01-18 15:23:58,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:23:58,702 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 117 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:58,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 102 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-01-18 15:23:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 311. [2022-01-18 15:23:58,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9483870967741934) internal successors, (914), 310 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2022-01-18 15:23:58,705 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2022-01-18 15:23:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:58,706 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2022-01-18 15:23:58,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2022-01-18 15:23:58,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:58,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:58,706 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:58,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Forceful destruction successful, exit code 0 [2022-01-18 15:23:58,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,509 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:58,906 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:58,907 INFO L85 PathProgramCache]: Analyzing trace with hash 769813172, now seen corresponding path program 509 times [2022-01-18 15:23:58,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:58,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202579157] [2022-01-18 15:23:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:58,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:23:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:23:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:58,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:23:58,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202579157] [2022-01-18 15:23:58,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202579157] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:23:58,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528141743] [2022-01-18 15:23:58,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:23:58,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:23:58,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:23:58,973 INFO L229 MonitoredProcess]: Starting monitored process 510 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:23:58,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Waiting until timeout for monitored process [2022-01-18 15:23:59,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:23:59,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:23:59,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:23:59,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:23:59,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:23:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:59,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:23:59,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:23:59,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:23:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:23:59,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528141743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:23:59,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:23:59,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:23:59,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766225027] [2022-01-18 15:23:59,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:23:59,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:23:59,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:23:59,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:23:59,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:23:59,549 INFO L87 Difference]: Start difference. First operand 311 states and 914 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:23:59,787 INFO L93 Difference]: Finished difference Result 501 states and 1425 transitions. [2022-01-18 15:23:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:23:59,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:23:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:23:59,788 INFO L225 Difference]: With dead ends: 501 [2022-01-18 15:23:59,789 INFO L226 Difference]: Without dead ends: 501 [2022-01-18 15:23:59,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:23:59,789 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 97 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:23:59,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 166 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:23:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-18 15:23:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 309. [2022-01-18 15:23:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9512987012987013) internal successors, (909), 308 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2022-01-18 15:23:59,793 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2022-01-18 15:23:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:23:59,793 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2022-01-18 15:23:59,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:23:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2022-01-18 15:23:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:23:59,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:23:59,793 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:23:59,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Ended with exit code 0 [2022-01-18 15:23:59,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2022-01-18 15:23:59,994 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:23:59,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:23:59,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2042019186, now seen corresponding path program 510 times [2022-01-18 15:23:59,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:23:59,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290027203] [2022-01-18 15:23:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:23:59,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:00,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:00,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290027203] [2022-01-18 15:24:00,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290027203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:00,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101116720] [2022-01-18 15:24:00,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:00,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:00,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:00,059 INFO L229 MonitoredProcess]: Starting monitored process 511 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:00,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Waiting until timeout for monitored process [2022-01-18 15:24:00,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:00,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:00,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:00,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:00,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:00,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:00,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:00,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101116720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:00,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:00,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:24:00,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484707847] [2022-01-18 15:24:00,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:00,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:24:00,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:24:00,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:24:00,587 INFO L87 Difference]: Start difference. First operand 309 states and 909 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:00,785 INFO L93 Difference]: Finished difference Result 476 states and 1375 transitions. [2022-01-18 15:24:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:00,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:00,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:00,786 INFO L225 Difference]: With dead ends: 476 [2022-01-18 15:24:00,786 INFO L226 Difference]: Without dead ends: 476 [2022-01-18 15:24:00,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:00,786 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:00,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 135 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-18 15:24:00,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 292. [2022-01-18 15:24:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9587628865979383) internal successors, (861), 291 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2022-01-18 15:24:00,790 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2022-01-18 15:24:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:00,790 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2022-01-18 15:24:00,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2022-01-18 15:24:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:00,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:00,790 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:00,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Ended with exit code 0 [2022-01-18 15:24:00,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2022-01-18 15:24:00,991 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:00,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1356800314, now seen corresponding path program 511 times [2022-01-18 15:24:00,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:00,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642750308] [2022-01-18 15:24:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:00,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:01,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642750308] [2022-01-18 15:24:01,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642750308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247137825] [2022-01-18 15:24:01,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:01,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:01,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:01,074 INFO L229 MonitoredProcess]: Starting monitored process 512 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:01,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Waiting until timeout for monitored process [2022-01-18 15:24:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:01,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:01,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:01,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:24:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:01,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:01,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:01,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:01,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247137825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:01,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:01,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:01,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705178890] [2022-01-18 15:24:01,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:01,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:01,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:01,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:01,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:01,931 INFO L87 Difference]: Start difference. First operand 292 states and 861 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:02,252 INFO L93 Difference]: Finished difference Result 481 states and 1385 transitions. [2022-01-18 15:24:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:02,252 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:02,253 INFO L225 Difference]: With dead ends: 481 [2022-01-18 15:24:02,253 INFO L226 Difference]: Without dead ends: 481 [2022-01-18 15:24:02,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:24:02,253 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:02,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 187 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-18 15:24:02,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 301. [2022-01-18 15:24:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.986666666666667) internal successors, (896), 300 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2022-01-18 15:24:02,257 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2022-01-18 15:24:02,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:02,257 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2022-01-18 15:24:02,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:02,257 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2022-01-18 15:24:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:02,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:02,257 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:02,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Ended with exit code 0 [2022-01-18 15:24:02,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2022-01-18 15:24:02,457 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:02,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:02,458 INFO L85 PathProgramCache]: Analyzing trace with hash -474722880, now seen corresponding path program 512 times [2022-01-18 15:24:02,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:02,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699273403] [2022-01-18 15:24:02,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:02,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:02,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:02,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699273403] [2022-01-18 15:24:02,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699273403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:02,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951020100] [2022-01-18 15:24:02,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:02,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:02,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:02,539 INFO L229 MonitoredProcess]: Starting monitored process 513 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:02,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Waiting until timeout for monitored process [2022-01-18 15:24:02,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:02,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:02,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:02,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:03,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 15:24:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:03,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:03,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:03,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:03,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951020100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:03,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:03,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:03,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787617230] [2022-01-18 15:24:03,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:03,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:03,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:03,333 INFO L87 Difference]: Start difference. First operand 301 states and 896 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:03,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:03,636 INFO L93 Difference]: Finished difference Result 487 states and 1392 transitions. [2022-01-18 15:24:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:24:03,636 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:03,637 INFO L225 Difference]: With dead ends: 487 [2022-01-18 15:24:03,637 INFO L226 Difference]: Without dead ends: 481 [2022-01-18 15:24:03,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:24:03,637 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 118 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:03,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 163 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:03,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-18 15:24:03,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 298. [2022-01-18 15:24:03,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:03,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2022-01-18 15:24:03,641 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2022-01-18 15:24:03,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:03,641 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2022-01-18 15:24:03,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:03,641 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2022-01-18 15:24:03,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:03,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:03,642 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:03,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Ended with exit code 0 [2022-01-18 15:24:03,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,513 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:03,842 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:03,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:03,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1009952682, now seen corresponding path program 513 times [2022-01-18 15:24:03,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:03,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556449935] [2022-01-18 15:24:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:03,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:03,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:03,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556449935] [2022-01-18 15:24:03,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556449935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:03,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770733280] [2022-01-18 15:24:03,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:03,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:03,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:03,923 INFO L229 MonitoredProcess]: Starting monitored process 514 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:03,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Waiting until timeout for monitored process [2022-01-18 15:24:04,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:24:04,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:04,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:04,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:24:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:04,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:04,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:04,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:04,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770733280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:04,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:04,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:24:04,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836025352] [2022-01-18 15:24:04,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:04,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:24:04,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:04,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:24:04,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:24:04,665 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:04,921 INFO L93 Difference]: Finished difference Result 451 states and 1310 transitions. [2022-01-18 15:24:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:04,922 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:04,922 INFO L225 Difference]: With dead ends: 451 [2022-01-18 15:24:04,922 INFO L226 Difference]: Without dead ends: 439 [2022-01-18 15:24:04,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:24:04,923 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:04,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 112 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-18 15:24:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 295. [2022-01-18 15:24:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2022-01-18 15:24:04,926 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2022-01-18 15:24:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:04,926 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2022-01-18 15:24:04,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2022-01-18 15:24:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:04,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:04,926 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:04,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:05,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 514 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2022-01-18 15:24:05,127 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:05,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:05,127 INFO L85 PathProgramCache]: Analyzing trace with hash 136180560, now seen corresponding path program 514 times [2022-01-18 15:24:05,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:05,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2653080] [2022-01-18 15:24:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:05,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:05,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:05,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2653080] [2022-01-18 15:24:05,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2653080] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:05,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450572259] [2022-01-18 15:24:05,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:05,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:05,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:05,213 INFO L229 MonitoredProcess]: Starting monitored process 515 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:05,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Waiting until timeout for monitored process [2022-01-18 15:24:05,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:05,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:05,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:05,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:05,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:24:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:05,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:05,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:05,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:06,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450572259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:06,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:06,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:06,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263797431] [2022-01-18 15:24:06,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:06,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:06,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:06,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:06,032 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:06,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:06,334 INFO L93 Difference]: Finished difference Result 568 states and 1603 transitions. [2022-01-18 15:24:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:06,335 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:06,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:06,336 INFO L225 Difference]: With dead ends: 568 [2022-01-18 15:24:06,336 INFO L226 Difference]: Without dead ends: 568 [2022-01-18 15:24:06,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:06,336 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 172 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:06,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 148 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:06,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-18 15:24:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 303. [2022-01-18 15:24:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.013245033112583) internal successors, (910), 302 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2022-01-18 15:24:06,340 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2022-01-18 15:24:06,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:06,340 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2022-01-18 15:24:06,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2022-01-18 15:24:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:06,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:06,341 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:06,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:06,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,515 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:06,541 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:06,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1018257994, now seen corresponding path program 515 times [2022-01-18 15:24:06,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:06,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067256197] [2022-01-18 15:24:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:06,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:06,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:06,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067256197] [2022-01-18 15:24:06,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067256197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:06,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459631791] [2022-01-18 15:24:06,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:06,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:06,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:06,627 INFO L229 MonitoredProcess]: Starting monitored process 516 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:06,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Waiting until timeout for monitored process [2022-01-18 15:24:06,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:06,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:06,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:07,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 73 [2022-01-18 15:24:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:07,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:07,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:07,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:07,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459631791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:07,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:07,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:07,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054259922] [2022-01-18 15:24:07,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:07,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:07,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:07,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:07,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:07,435 INFO L87 Difference]: Start difference. First operand 303 states and 910 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:07,891 INFO L93 Difference]: Finished difference Result 597 states and 1649 transitions. [2022-01-18 15:24:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:24:07,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:07,892 INFO L225 Difference]: With dead ends: 597 [2022-01-18 15:24:07,892 INFO L226 Difference]: Without dead ends: 591 [2022-01-18 15:24:07,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:07,892 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 137 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:07,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 253 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-18 15:24:07,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 306. [2022-01-18 15:24:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9901639344262296) internal successors, (912), 305 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2022-01-18 15:24:07,896 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2022-01-18 15:24:07,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:07,896 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2022-01-18 15:24:07,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:07,896 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2022-01-18 15:24:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:07,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:07,896 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:07,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Ended with exit code 0 [2022-01-18 15:24:08,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,516 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:08,097 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash 877077894, now seen corresponding path program 516 times [2022-01-18 15:24:08,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:08,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518519069] [2022-01-18 15:24:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:08,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:08,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:08,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518519069] [2022-01-18 15:24:08,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518519069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:08,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704114558] [2022-01-18 15:24:08,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:08,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:08,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:08,189 INFO L229 MonitoredProcess]: Starting monitored process 517 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:08,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Waiting until timeout for monitored process [2022-01-18 15:24:08,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:08,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:08,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:08,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:08,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:24:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:08,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:08,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:08,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:09,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704114558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:09,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:09,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:09,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54073701] [2022-01-18 15:24:09,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:09,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:09,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:09,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:09,070 INFO L87 Difference]: Start difference. First operand 306 states and 912 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:09,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:09,296 INFO L93 Difference]: Finished difference Result 536 states and 1524 transitions. [2022-01-18 15:24:09,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:09,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:09,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:09,297 INFO L225 Difference]: With dead ends: 536 [2022-01-18 15:24:09,297 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 15:24:09,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:24:09,298 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 111 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:09,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 150 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 15:24:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 299. [2022-01-18 15:24:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0) internal successors, (894), 298 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2022-01-18 15:24:09,301 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2022-01-18 15:24:09,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:09,302 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2022-01-18 15:24:09,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2022-01-18 15:24:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:09,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:09,302 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:09,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:09,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2022-01-18 15:24:09,502 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:09,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1871453514, now seen corresponding path program 517 times [2022-01-18 15:24:09,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:09,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864974986] [2022-01-18 15:24:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:09,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:09,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:09,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864974986] [2022-01-18 15:24:09,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864974986] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:09,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5330071] [2022-01-18 15:24:09,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:09,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:09,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:09,590 INFO L229 MonitoredProcess]: Starting monitored process 518 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:09,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Waiting until timeout for monitored process [2022-01-18 15:24:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:09,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:09,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:10,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-01-18 15:24:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:10,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:10,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:10,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:10,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5330071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:10,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:10,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:10,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408297010] [2022-01-18 15:24:10,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:10,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:10,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:10,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:10,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:10,463 INFO L87 Difference]: Start difference. First operand 299 states and 894 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:10,719 INFO L93 Difference]: Finished difference Result 532 states and 1513 transitions. [2022-01-18 15:24:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:24:10,719 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:10,720 INFO L225 Difference]: With dead ends: 532 [2022-01-18 15:24:10,720 INFO L226 Difference]: Without dead ends: 532 [2022-01-18 15:24:10,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:24:10,720 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 146 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:10,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 159 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:10,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-18 15:24:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 296. [2022-01-18 15:24:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9796610169491524) internal successors, (879), 295 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2022-01-18 15:24:10,724 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2022-01-18 15:24:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:10,724 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2022-01-18 15:24:10,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2022-01-18 15:24:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:10,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:10,725 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:10,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:10,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,518 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:10,925 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:10,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1443060650, now seen corresponding path program 518 times [2022-01-18 15:24:10,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:10,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140281855] [2022-01-18 15:24:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:10,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:11,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:11,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140281855] [2022-01-18 15:24:11,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140281855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:11,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858391877] [2022-01-18 15:24:11,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:11,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:11,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:11,012 INFO L229 MonitoredProcess]: Starting monitored process 519 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:11,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Waiting until timeout for monitored process [2022-01-18 15:24:11,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:11,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:11,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:11,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:24:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:11,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:11,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:11,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:11,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858391877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:11,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:11,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:11,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588384024] [2022-01-18 15:24:11,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:11,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:11,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:11,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:11,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:11,833 INFO L87 Difference]: Start difference. First operand 296 states and 879 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:12,208 INFO L93 Difference]: Finished difference Result 536 states and 1516 transitions. [2022-01-18 15:24:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:24:12,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:12,209 INFO L225 Difference]: With dead ends: 536 [2022-01-18 15:24:12,209 INFO L226 Difference]: Without dead ends: 530 [2022-01-18 15:24:12,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:12,210 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 148 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:12,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 182 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-18 15:24:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 306. [2022-01-18 15:24:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9704918032786884) internal successors, (906), 305 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2022-01-18 15:24:12,213 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2022-01-18 15:24:12,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:12,214 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2022-01-18 15:24:12,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2022-01-18 15:24:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:12,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:12,214 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:12,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:12,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,519 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:12,414 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:12,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:12,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1419160736, now seen corresponding path program 519 times [2022-01-18 15:24:12,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:12,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830394385] [2022-01-18 15:24:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:12,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:12,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:12,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830394385] [2022-01-18 15:24:12,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830394385] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:12,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525910269] [2022-01-18 15:24:12,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:12,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:12,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:12,514 INFO L229 MonitoredProcess]: Starting monitored process 520 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:12,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Waiting until timeout for monitored process [2022-01-18 15:24:12,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:24:12,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:12,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:12,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:12,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 73 [2022-01-18 15:24:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:13,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:13,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:13,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:13,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525910269] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:13,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:13,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:13,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236540054] [2022-01-18 15:24:13,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:13,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:13,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:13,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:13,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:13,358 INFO L87 Difference]: Start difference. First operand 306 states and 906 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:13,694 INFO L93 Difference]: Finished difference Result 513 states and 1477 transitions. [2022-01-18 15:24:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:13,694 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:13,695 INFO L225 Difference]: With dead ends: 513 [2022-01-18 15:24:13,695 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 15:24:13,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:13,695 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 117 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:13,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 172 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 15:24:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 295. [2022-01-18 15:24:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2022-01-18 15:24:13,699 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2022-01-18 15:24:13,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:13,699 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2022-01-18 15:24:13,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2022-01-18 15:24:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:13,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:13,699 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:13,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Ended with exit code 0 [2022-01-18 15:24:13,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2022-01-18 15:24:13,900 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:13,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1419318, now seen corresponding path program 520 times [2022-01-18 15:24:13,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:13,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126975051] [2022-01-18 15:24:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:13,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:13,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126975051] [2022-01-18 15:24:13,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126975051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942621997] [2022-01-18 15:24:13,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:13,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:13,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:13,979 INFO L229 MonitoredProcess]: Starting monitored process 521 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:13,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Waiting until timeout for monitored process [2022-01-18 15:24:14,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:14,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:14,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:14,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:24:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:14,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:14,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:14,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:14,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942621997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:14,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:14,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:24:14,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351400299] [2022-01-18 15:24:14,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:14,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:24:14,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:14,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:24:14,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:24:14,710 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:14,970 INFO L93 Difference]: Finished difference Result 453 states and 1314 transitions. [2022-01-18 15:24:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:14,970 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:14,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:14,971 INFO L225 Difference]: With dead ends: 453 [2022-01-18 15:24:14,971 INFO L226 Difference]: Without dead ends: 441 [2022-01-18 15:24:14,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:24:14,971 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:14,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 111 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-01-18 15:24:14,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 297. [2022-01-18 15:24:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2022-01-18 15:24:14,974 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2022-01-18 15:24:14,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:14,974 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2022-01-18 15:24:14,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2022-01-18 15:24:14,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:14,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:14,975 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:14,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:15,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2022-01-18 15:24:15,175 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:15,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:15,175 INFO L85 PathProgramCache]: Analyzing trace with hash 739478016, now seen corresponding path program 521 times [2022-01-18 15:24:15,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:15,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220230502] [2022-01-18 15:24:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:15,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:15,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:15,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220230502] [2022-01-18 15:24:15,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220230502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:15,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225233446] [2022-01-18 15:24:15,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:15,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:15,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:15,257 INFO L229 MonitoredProcess]: Starting monitored process 522 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:15,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Waiting until timeout for monitored process [2022-01-18 15:24:15,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:15,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:15,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:15,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:15,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:24:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:15,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:15,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:15,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:16,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225233446] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:16,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:16,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:16,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701254441] [2022-01-18 15:24:16,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:16,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:16,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:16,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:16,052 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:16,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:16,395 INFO L93 Difference]: Finished difference Result 478 states and 1366 transitions. [2022-01-18 15:24:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:16,396 INFO L225 Difference]: With dead ends: 478 [2022-01-18 15:24:16,396 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 15:24:16,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:24:16,396 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:16,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 199 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 15:24:16,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 307. [2022-01-18 15:24:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9607843137254903) internal successors, (906), 306 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:16,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2022-01-18 15:24:16,400 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2022-01-18 15:24:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:16,400 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2022-01-18 15:24:16,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2022-01-18 15:24:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:16,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:16,401 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:16,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Ended with exit code 0 [2022-01-18 15:24:16,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,522 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:16,601 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:16,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:16,601 INFO L85 PathProgramCache]: Analyzing trace with hash 763377930, now seen corresponding path program 522 times [2022-01-18 15:24:16,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:16,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709646221] [2022-01-18 15:24:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:16,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:16,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:16,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709646221] [2022-01-18 15:24:16,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709646221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:16,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604121536] [2022-01-18 15:24:16,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:16,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:16,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:16,688 INFO L229 MonitoredProcess]: Starting monitored process 523 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:16,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Waiting until timeout for monitored process [2022-01-18 15:24:16,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:16,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:16,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:16,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:17,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:24:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:17,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:17,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:17,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:17,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604121536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:17,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:17,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:17,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8423639] [2022-01-18 15:24:17,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:17,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:17,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:17,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:17,500 INFO L87 Difference]: Start difference. First operand 307 states and 906 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:17,720 INFO L93 Difference]: Finished difference Result 449 states and 1312 transitions. [2022-01-18 15:24:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:17,721 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:17,721 INFO L225 Difference]: With dead ends: 449 [2022-01-18 15:24:17,721 INFO L226 Difference]: Without dead ends: 449 [2022-01-18 15:24:17,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:24:17,721 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:17,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 105 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:17,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-01-18 15:24:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 294. [2022-01-18 15:24:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2022-01-18 15:24:17,725 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2022-01-18 15:24:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:17,725 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2022-01-18 15:24:17,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2022-01-18 15:24:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:17,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:17,725 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:17,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:17,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,523 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:17,926 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:17,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:17,926 INFO L85 PathProgramCache]: Analyzing trace with hash -500286294, now seen corresponding path program 523 times [2022-01-18 15:24:17,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:17,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219649746] [2022-01-18 15:24:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:17,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:18,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:18,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219649746] [2022-01-18 15:24:18,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219649746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:18,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023225148] [2022-01-18 15:24:18,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:18,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:18,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:18,012 INFO L229 MonitoredProcess]: Starting monitored process 524 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:18,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Waiting until timeout for monitored process [2022-01-18 15:24:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:18,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:18,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:18,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:24:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:18,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:18,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:18,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:18,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023225148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:18,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:18,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:18,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860154412] [2022-01-18 15:24:18,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:18,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:18,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:18,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:18,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:18,738 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:19,053 INFO L93 Difference]: Finished difference Result 578 states and 1617 transitions. [2022-01-18 15:24:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:19,054 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:19,054 INFO L225 Difference]: With dead ends: 578 [2022-01-18 15:24:19,054 INFO L226 Difference]: Without dead ends: 578 [2022-01-18 15:24:19,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:19,055 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 133 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:19,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 210 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-18 15:24:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 304. [2022-01-18 15:24:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0165016501650164) internal successors, (914), 303 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:19,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2022-01-18 15:24:19,059 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2022-01-18 15:24:19,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:19,059 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2022-01-18 15:24:19,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:19,059 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2022-01-18 15:24:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:19,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:19,059 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:19,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Ended with exit code 0 [2022-01-18 15:24:19,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2022-01-18 15:24:19,260 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:19,260 INFO L85 PathProgramCache]: Analyzing trace with hash 381791140, now seen corresponding path program 524 times [2022-01-18 15:24:19,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:19,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254200695] [2022-01-18 15:24:19,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:19,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:19,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:19,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254200695] [2022-01-18 15:24:19,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254200695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:19,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467400830] [2022-01-18 15:24:19,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:19,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:19,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:19,344 INFO L229 MonitoredProcess]: Starting monitored process 525 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:19,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Waiting until timeout for monitored process [2022-01-18 15:24:19,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:19,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:19,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:24:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:19,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:20,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:20,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:20,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467400830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:20,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:20,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:20,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37437448] [2022-01-18 15:24:20,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:20,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:20,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:20,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:20,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:20,084 INFO L87 Difference]: Start difference. First operand 304 states and 914 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:20,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:20,370 INFO L93 Difference]: Finished difference Result 555 states and 1560 transitions. [2022-01-18 15:24:20,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:24:20,370 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:20,371 INFO L225 Difference]: With dead ends: 555 [2022-01-18 15:24:20,371 INFO L226 Difference]: Without dead ends: 549 [2022-01-18 15:24:20,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:24:20,371 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 160 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:20,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 192 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-18 15:24:20,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 307. [2022-01-18 15:24:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:20,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2022-01-18 15:24:20,375 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2022-01-18 15:24:20,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:20,375 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2022-01-18 15:24:20,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:20,376 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2022-01-18 15:24:20,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:20,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:20,376 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:20,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Ended with exit code 0 [2022-01-18 15:24:20,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2022-01-18 15:24:20,576 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:20,577 INFO L85 PathProgramCache]: Analyzing trace with hash 240611040, now seen corresponding path program 525 times [2022-01-18 15:24:20,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:20,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901949149] [2022-01-18 15:24:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:20,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:20,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:20,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901949149] [2022-01-18 15:24:20,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901949149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:20,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466405856] [2022-01-18 15:24:20,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:20,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:20,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:20,670 INFO L229 MonitoredProcess]: Starting monitored process 526 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:20,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Waiting until timeout for monitored process [2022-01-18 15:24:20,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:24:20,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:20,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:20,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:21,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:24:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:21,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:21,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:21,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:21,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466405856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:21,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:21,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:21,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159954526] [2022-01-18 15:24:21,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:21,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:21,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:21,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:21,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:21,436 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:21,747 INFO L93 Difference]: Finished difference Result 584 states and 1657 transitions. [2022-01-18 15:24:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:21,748 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:21,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:21,749 INFO L225 Difference]: With dead ends: 584 [2022-01-18 15:24:21,749 INFO L226 Difference]: Without dead ends: 584 [2022-01-18 15:24:21,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:21,749 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 179 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:21,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 202 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:21,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-18 15:24:21,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 310. [2022-01-18 15:24:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.01294498381877) internal successors, (931), 309 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2022-01-18 15:24:21,753 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2022-01-18 15:24:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:21,753 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2022-01-18 15:24:21,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:21,753 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2022-01-18 15:24:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:21,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:21,753 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:21,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Ended with exit code 0 [2022-01-18 15:24:21,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,526 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:21,954 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:21,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:21,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1234986660, now seen corresponding path program 526 times [2022-01-18 15:24:21,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:21,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296628007] [2022-01-18 15:24:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:21,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:22,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296628007] [2022-01-18 15:24:22,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296628007] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366808851] [2022-01-18 15:24:22,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:22,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:22,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:22,042 INFO L229 MonitoredProcess]: Starting monitored process 527 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:22,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Waiting until timeout for monitored process [2022-01-18 15:24:22,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:22,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:22,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:24:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:22,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:22,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:22,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:22,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366808851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:22,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:22,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:22,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747136972] [2022-01-18 15:24:22,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:22,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:22,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:22,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:22,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:22,796 INFO L87 Difference]: Start difference. First operand 310 states and 931 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:23,201 INFO L93 Difference]: Finished difference Result 580 states and 1646 transitions. [2022-01-18 15:24:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:24:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:23,202 INFO L225 Difference]: With dead ends: 580 [2022-01-18 15:24:23,202 INFO L226 Difference]: Without dead ends: 580 [2022-01-18 15:24:23,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:23,203 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 152 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:23,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 237 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-18 15:24:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 307. [2022-01-18 15:24:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2022-01-18 15:24:23,207 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2022-01-18 15:24:23,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:23,207 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2022-01-18 15:24:23,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:23,207 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2022-01-18 15:24:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:23,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:23,207 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:23,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:23,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,527 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:23,408 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2079527504, now seen corresponding path program 527 times [2022-01-18 15:24:23,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:23,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023199419] [2022-01-18 15:24:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:23,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:23,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:23,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023199419] [2022-01-18 15:24:23,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023199419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:23,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265439650] [2022-01-18 15:24:23,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:23,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:23,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:23,492 INFO L229 MonitoredProcess]: Starting monitored process 528 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:23,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Waiting until timeout for monitored process [2022-01-18 15:24:23,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:24:23,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:23,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:23,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:23,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:24:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:24,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:24,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:24,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:24,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265439650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:24,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:24,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:24,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265730216] [2022-01-18 15:24:24,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:24,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:24,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:24,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:24,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:24,204 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:24,482 INFO L93 Difference]: Finished difference Result 572 states and 1609 transitions. [2022-01-18 15:24:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:24,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:24,483 INFO L225 Difference]: With dead ends: 572 [2022-01-18 15:24:24,483 INFO L226 Difference]: Without dead ends: 566 [2022-01-18 15:24:24,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:24:24,483 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 195 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:24,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 134 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:24,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-18 15:24:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 311. [2022-01-18 15:24:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2022-01-18 15:24:24,488 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2022-01-18 15:24:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:24,488 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2022-01-18 15:24:24,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2022-01-18 15:24:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:24,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:24,488 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:24,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Ended with exit code 0 [2022-01-18 15:24:24,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,528 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:24,688 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:24,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2055627590, now seen corresponding path program 528 times [2022-01-18 15:24:24,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:24,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918090517] [2022-01-18 15:24:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:24,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:24,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:24,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918090517] [2022-01-18 15:24:24,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918090517] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:24,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444706275] [2022-01-18 15:24:24,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:24,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:24,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:24,776 INFO L229 MonitoredProcess]: Starting monitored process 529 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:24,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Waiting until timeout for monitored process [2022-01-18 15:24:25,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:25,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:25,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:24:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:25,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:25,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:25,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:25,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444706275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:25,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:25,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:25,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439033366] [2022-01-18 15:24:25,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:25,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:25,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:25,525 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:25,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:25,880 INFO L93 Difference]: Finished difference Result 578 states and 1630 transitions. [2022-01-18 15:24:25,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:24:25,880 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:25,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:25,881 INFO L225 Difference]: With dead ends: 578 [2022-01-18 15:24:25,881 INFO L226 Difference]: Without dead ends: 578 [2022-01-18 15:24:25,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:25,881 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 160 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:25,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 218 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:25,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-18 15:24:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 308. [2022-01-18 15:24:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.996742671009772) internal successors, (920), 307 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2022-01-18 15:24:25,885 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2022-01-18 15:24:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:25,886 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2022-01-18 15:24:25,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2022-01-18 15:24:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:25,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:25,886 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:25,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Ended with exit code 0 [2022-01-18 15:24:26,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,529 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:26,086 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:26,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:26,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1026846138, now seen corresponding path program 529 times [2022-01-18 15:24:26,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:26,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699377775] [2022-01-18 15:24:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:26,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:26,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:26,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699377775] [2022-01-18 15:24:26,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699377775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:26,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001253323] [2022-01-18 15:24:26,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:26,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:26,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:26,175 INFO L229 MonitoredProcess]: Starting monitored process 530 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:26,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Waiting until timeout for monitored process [2022-01-18 15:24:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:26,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:26,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:26,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:24:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:26,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:26,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:26,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:26,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001253323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:26,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:26,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:26,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470311160] [2022-01-18 15:24:26,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:26,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:26,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:26,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:26,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:26,899 INFO L87 Difference]: Start difference. First operand 308 states and 920 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:27,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:27,158 INFO L93 Difference]: Finished difference Result 508 states and 1475 transitions. [2022-01-18 15:24:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:27,158 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:27,159 INFO L225 Difference]: With dead ends: 508 [2022-01-18 15:24:27,159 INFO L226 Difference]: Without dead ends: 508 [2022-01-18 15:24:27,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:24:27,159 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 67 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:27,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 198 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-18 15:24:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 309. [2022-01-18 15:24:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9935064935064934) internal successors, (922), 308 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2022-01-18 15:24:27,163 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2022-01-18 15:24:27,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:27,163 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2022-01-18 15:24:27,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:27,163 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2022-01-18 15:24:27,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:27,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:27,164 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:27,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:27,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 530 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2022-01-18 15:24:27,364 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:27,364 INFO L85 PathProgramCache]: Analyzing trace with hash -32470518, now seen corresponding path program 530 times [2022-01-18 15:24:27,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:27,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333044935] [2022-01-18 15:24:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:27,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:27,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:27,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333044935] [2022-01-18 15:24:27,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333044935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:27,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722339906] [2022-01-18 15:24:27,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:27,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:27,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:27,453 INFO L229 MonitoredProcess]: Starting monitored process 531 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:27,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Waiting until timeout for monitored process [2022-01-18 15:24:27,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:27,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:27,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:24:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:27,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:28,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:28,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:28,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722339906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:28,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:28,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:28,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719019144] [2022-01-18 15:24:28,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:28,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:28,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:28,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:28,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:28,179 INFO L87 Difference]: Start difference. First operand 309 states and 922 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:28,498 INFO L93 Difference]: Finished difference Result 529 states and 1513 transitions. [2022-01-18 15:24:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:28,499 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:28,499 INFO L225 Difference]: With dead ends: 529 [2022-01-18 15:24:28,500 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 15:24:28,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:28,500 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 153 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:28,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 188 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 15:24:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 298. [2022-01-18 15:24:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2022-01-18 15:24:28,503 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2022-01-18 15:24:28,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:28,504 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2022-01-18 15:24:28,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2022-01-18 15:24:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:28,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:28,504 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:28,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Ended with exit code 0 [2022-01-18 15:24:28,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2022-01-18 15:24:28,704 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:28,705 INFO L85 PathProgramCache]: Analyzing trace with hash -327897700, now seen corresponding path program 531 times [2022-01-18 15:24:28,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:28,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547311097] [2022-01-18 15:24:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:28,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:28,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:28,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547311097] [2022-01-18 15:24:28,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547311097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:28,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079081424] [2022-01-18 15:24:28,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:28,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:28,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:28,792 INFO L229 MonitoredProcess]: Starting monitored process 532 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:28,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Waiting until timeout for monitored process [2022-01-18 15:24:29,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:24:29,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:29,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:29,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:29,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:29,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:29,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:29,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079081424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:29,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:29,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:29,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147608499] [2022-01-18 15:24:29,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:29,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:29,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:29,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:29,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:29,503 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:29,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:29,695 INFO L93 Difference]: Finished difference Result 451 states and 1320 transitions. [2022-01-18 15:24:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:29,695 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:29,696 INFO L225 Difference]: With dead ends: 451 [2022-01-18 15:24:29,696 INFO L226 Difference]: Without dead ends: 451 [2022-01-18 15:24:29,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:24:29,696 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:29,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 124 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-18 15:24:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 295. [2022-01-18 15:24:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9693877551020407) internal successors, (873), 294 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2022-01-18 15:24:29,699 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2022-01-18 15:24:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:29,699 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2022-01-18 15:24:29,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2022-01-18 15:24:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:29,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:29,700 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:29,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Ended with exit code 0 [2022-01-18 15:24:29,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2022-01-18 15:24:29,900 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:29,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1164446016, now seen corresponding path program 532 times [2022-01-18 15:24:29,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:29,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550484120] [2022-01-18 15:24:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:29,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:29,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550484120] [2022-01-18 15:24:29,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550484120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360815739] [2022-01-18 15:24:29,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:29,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:29,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:29,990 INFO L229 MonitoredProcess]: Starting monitored process 533 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:29,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Waiting until timeout for monitored process [2022-01-18 15:24:30,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:30,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:30,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:30,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:30,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:24:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:30,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:30,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:30,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:30,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360815739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:30,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:30,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:30,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158798381] [2022-01-18 15:24:30,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:30,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:30,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:30,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:30,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:30,661 INFO L87 Difference]: Start difference. First operand 295 states and 873 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:30,869 INFO L93 Difference]: Finished difference Result 496 states and 1414 transitions. [2022-01-18 15:24:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:30,870 INFO L225 Difference]: With dead ends: 496 [2022-01-18 15:24:30,870 INFO L226 Difference]: Without dead ends: 490 [2022-01-18 15:24:30,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:24:30,871 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 85 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:30,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 141 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:30,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-18 15:24:30,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 309. [2022-01-18 15:24:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.961038961038961) internal successors, (912), 308 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:30,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2022-01-18 15:24:30,874 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2022-01-18 15:24:30,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:30,875 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2022-01-18 15:24:30,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:30,875 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2022-01-18 15:24:30,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:30,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:30,875 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:30,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Ended with exit code 0 [2022-01-18 15:24:31,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2022-01-18 15:24:31,075 INFO L402 AbstractCegarLoop]: === Iteration 535 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:31,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1140546102, now seen corresponding path program 533 times [2022-01-18 15:24:31,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:31,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120868388] [2022-01-18 15:24:31,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:31,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:31,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:31,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120868388] [2022-01-18 15:24:31,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120868388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:31,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336672919] [2022-01-18 15:24:31,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:31,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:31,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:31,157 INFO L229 MonitoredProcess]: Starting monitored process 534 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:31,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Waiting until timeout for monitored process [2022-01-18 15:24:31,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:24:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:31,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:31,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:31,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:24:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:31,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:31,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:31,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:31,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336672919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:31,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:31,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:31,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570723658] [2022-01-18 15:24:31,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:31,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:31,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:31,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:31,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:31,849 INFO L87 Difference]: Start difference. First operand 309 states and 912 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:32,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:32,111 INFO L93 Difference]: Finished difference Result 502 states and 1435 transitions. [2022-01-18 15:24:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:24:32,111 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:32,112 INFO L225 Difference]: With dead ends: 502 [2022-01-18 15:24:32,112 INFO L226 Difference]: Without dead ends: 502 [2022-01-18 15:24:32,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:24:32,112 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:32,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 186 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-18 15:24:32,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 307. [2022-01-18 15:24:32,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9640522875816995) internal successors, (907), 306 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2022-01-18 15:24:32,116 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2022-01-18 15:24:32,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:32,116 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2022-01-18 15:24:32,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:32,116 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2022-01-18 15:24:32,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:32,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:32,116 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:32,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Ended with exit code 0 [2022-01-18 15:24:32,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 534 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2022-01-18 15:24:32,316 INFO L402 AbstractCegarLoop]: === Iteration 536 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:32,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:32,317 INFO L85 PathProgramCache]: Analyzing trace with hash 342588836, now seen corresponding path program 534 times [2022-01-18 15:24:32,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:32,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594108388] [2022-01-18 15:24:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:32,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:32,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:32,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594108388] [2022-01-18 15:24:32,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594108388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:32,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333805956] [2022-01-18 15:24:32,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:32,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:32,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:32,400 INFO L229 MonitoredProcess]: Starting monitored process 535 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:32,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Waiting until timeout for monitored process [2022-01-18 15:24:32,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:32,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:32,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:32,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:33,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:33,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:33,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333805956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:33,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:33,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:33,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431022202] [2022-01-18 15:24:33,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:33,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:33,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:33,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:33,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:33,094 INFO L87 Difference]: Start difference. First operand 307 states and 907 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:33,295 INFO L93 Difference]: Finished difference Result 471 states and 1370 transitions. [2022-01-18 15:24:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:33,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:33,296 INFO L225 Difference]: With dead ends: 471 [2022-01-18 15:24:33,296 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 15:24:33,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:24:33,296 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 93 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:33,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 121 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 15:24:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 294. [2022-01-18 15:24:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2022-01-18 15:24:33,299 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2022-01-18 15:24:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:33,300 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2022-01-18 15:24:33,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:33,300 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2022-01-18 15:24:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:33,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:33,300 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:33,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:33,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535,535 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:33,500 INFO L402 AbstractCegarLoop]: === Iteration 537 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:33,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1698664262, now seen corresponding path program 535 times [2022-01-18 15:24:33,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:33,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330359653] [2022-01-18 15:24:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:33,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:33,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:33,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330359653] [2022-01-18 15:24:33,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330359653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:33,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364536763] [2022-01-18 15:24:33,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:33,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:33,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:33,580 INFO L229 MonitoredProcess]: Starting monitored process 536 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:33,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Waiting until timeout for monitored process [2022-01-18 15:24:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:33,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:33,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:34,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:24:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:34,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:34,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:34,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:34,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364536763] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:34,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:34,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:24:34,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755229723] [2022-01-18 15:24:34,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:34,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:24:34,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:34,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:24:34,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:24:34,221 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:34,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:34,411 INFO L93 Difference]: Finished difference Result 443 states and 1286 transitions. [2022-01-18 15:24:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:34,412 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:34,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:34,412 INFO L225 Difference]: With dead ends: 443 [2022-01-18 15:24:34,412 INFO L226 Difference]: Without dead ends: 431 [2022-01-18 15:24:34,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:24:34,412 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:34,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 114 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:34,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-18 15:24:34,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 298. [2022-01-18 15:24:34,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.95959595959596) internal successors, (879), 297 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2022-01-18 15:24:34,416 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2022-01-18 15:24:34,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:34,416 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2022-01-18 15:24:34,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:34,416 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2022-01-18 15:24:34,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:34,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:34,416 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:34,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:34,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536,536 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:34,617 INFO L402 AbstractCegarLoop]: === Iteration 538 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:34,617 INFO L85 PathProgramCache]: Analyzing trace with hash -957766928, now seen corresponding path program 536 times [2022-01-18 15:24:34,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:34,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489481286] [2022-01-18 15:24:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:34,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:34,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:34,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489481286] [2022-01-18 15:24:34,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489481286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:34,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793123092] [2022-01-18 15:24:34,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:34,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:34,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:34,686 INFO L229 MonitoredProcess]: Starting monitored process 537 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:34,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Waiting until timeout for monitored process [2022-01-18 15:24:34,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:34,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:34,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:34,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:35,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:24:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:35,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:35,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:35,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:35,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793123092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:35,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:35,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:24:35,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674218965] [2022-01-18 15:24:35,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:35,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:24:35,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:35,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:24:35,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:24:35,350 INFO L87 Difference]: Start difference. First operand 298 states and 879 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:35,602 INFO L93 Difference]: Finished difference Result 468 states and 1338 transitions. [2022-01-18 15:24:35,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:35,602 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:35,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:35,603 INFO L225 Difference]: With dead ends: 468 [2022-01-18 15:24:35,603 INFO L226 Difference]: Without dead ends: 462 [2022-01-18 15:24:35,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:24:35,603 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:35,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 148 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:35,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-18 15:24:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 308. [2022-01-18 15:24:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.95114006514658) internal successors, (906), 307 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2022-01-18 15:24:35,607 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2022-01-18 15:24:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:35,607 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2022-01-18 15:24:35,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2022-01-18 15:24:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:35,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:35,607 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:35,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Ended with exit code 0 [2022-01-18 15:24:35,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2022-01-18 15:24:35,808 INFO L402 AbstractCegarLoop]: === Iteration 539 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:35,808 INFO L85 PathProgramCache]: Analyzing trace with hash -933867014, now seen corresponding path program 537 times [2022-01-18 15:24:35,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:35,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232709984] [2022-01-18 15:24:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:35,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:35,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:35,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232709984] [2022-01-18 15:24:35,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232709984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:35,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998639871] [2022-01-18 15:24:35,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:35,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:35,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:35,882 INFO L229 MonitoredProcess]: Starting monitored process 538 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:35,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Waiting until timeout for monitored process [2022-01-18 15:24:36,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:24:36,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:36,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:36,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:36,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:24:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:36,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:36,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:36,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:24:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:36,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998639871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:36,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:36,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:36,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294502520] [2022-01-18 15:24:36,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:36,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:36,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:36,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:36,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:36,563 INFO L87 Difference]: Start difference. First operand 308 states and 906 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:36,733 INFO L93 Difference]: Finished difference Result 439 states and 1284 transitions. [2022-01-18 15:24:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:36,733 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:36,734 INFO L225 Difference]: With dead ends: 439 [2022-01-18 15:24:36,734 INFO L226 Difference]: Without dead ends: 439 [2022-01-18 15:24:36,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:24:36,734 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:36,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 110 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-18 15:24:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 296. [2022-01-18 15:24:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9627118644067796) internal successors, (874), 295 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2022-01-18 15:24:36,737 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2022-01-18 15:24:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:36,738 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2022-01-18 15:24:36,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2022-01-18 15:24:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:36,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:36,738 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:36,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Ended with exit code 0 [2022-01-18 15:24:36,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,538 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:36,938 INFO L402 AbstractCegarLoop]: === Iteration 540 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:36,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2069743190, now seen corresponding path program 538 times [2022-01-18 15:24:36,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:36,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578484171] [2022-01-18 15:24:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:36,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:37,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:37,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578484171] [2022-01-18 15:24:37,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578484171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:37,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368221983] [2022-01-18 15:24:37,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:37,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:37,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:37,010 INFO L229 MonitoredProcess]: Starting monitored process 539 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:37,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Waiting until timeout for monitored process [2022-01-18 15:24:37,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:37,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:37,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:37,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:37,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:24:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:37,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:37,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:37,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:37,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368221983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:37,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:37,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:24:37,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957036020] [2022-01-18 15:24:37,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:37,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:24:37,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:37,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:24:37,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:24:37,618 INFO L87 Difference]: Start difference. First operand 296 states and 874 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:37,798 INFO L93 Difference]: Finished difference Result 474 states and 1353 transitions. [2022-01-18 15:24:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:37,798 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:37,798 INFO L225 Difference]: With dead ends: 474 [2022-01-18 15:24:37,799 INFO L226 Difference]: Without dead ends: 468 [2022-01-18 15:24:37,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:24:37,799 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:37,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 132 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-18 15:24:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2022-01-18 15:24:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.954692556634304) internal successors, (913), 309 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2022-01-18 15:24:37,802 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2022-01-18 15:24:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:37,802 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2022-01-18 15:24:37,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2022-01-18 15:24:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:37,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:37,803 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:37,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Ended with exit code 0 [2022-01-18 15:24:38,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2022-01-18 15:24:38,003 INFO L402 AbstractCegarLoop]: === Iteration 541 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:38,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2093643104, now seen corresponding path program 539 times [2022-01-18 15:24:38,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:38,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805666388] [2022-01-18 15:24:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:38,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:38,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:38,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805666388] [2022-01-18 15:24:38,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805666388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:38,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5121764] [2022-01-18 15:24:38,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:38,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:38,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:38,079 INFO L229 MonitoredProcess]: Starting monitored process 540 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:38,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Waiting until timeout for monitored process [2022-01-18 15:24:38,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:24:38,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:38,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:38,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:38,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:24:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:38,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:38,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:38,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:38,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5121764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:38,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:38,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:38,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768159407] [2022-01-18 15:24:38,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:38,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:38,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:38,711 INFO L87 Difference]: Start difference. First operand 310 states and 913 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:38,946 INFO L93 Difference]: Finished difference Result 474 states and 1359 transitions. [2022-01-18 15:24:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:24:38,946 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:38,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:38,947 INFO L225 Difference]: With dead ends: 474 [2022-01-18 15:24:38,947 INFO L226 Difference]: Without dead ends: 474 [2022-01-18 15:24:38,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:24:38,947 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:38,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 186 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:38,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-18 15:24:38,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 308. [2022-01-18 15:24:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.957654723127036) internal successors, (908), 307 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2022-01-18 15:24:38,951 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2022-01-18 15:24:38,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:38,951 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2022-01-18 15:24:38,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2022-01-18 15:24:38,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:38,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:38,951 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:38,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Ended with exit code 0 [2022-01-18 15:24:39,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 540 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2022-01-18 15:24:39,152 INFO L402 AbstractCegarLoop]: === Iteration 542 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash -718189254, now seen corresponding path program 540 times [2022-01-18 15:24:39,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:39,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465400939] [2022-01-18 15:24:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:39,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:39,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:39,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465400939] [2022-01-18 15:24:39,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465400939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:39,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062178674] [2022-01-18 15:24:39,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:39,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:39,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:39,224 INFO L229 MonitoredProcess]: Starting monitored process 541 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:39,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Waiting until timeout for monitored process [2022-01-18 15:24:39,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:39,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:39,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:39,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:39,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:39,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:39,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:24:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:39,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062178674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:39,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:39,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:39,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552476856] [2022-01-18 15:24:39,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:39,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:39,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:39,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:39,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:39,823 INFO L87 Difference]: Start difference. First operand 308 states and 908 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:40,005 INFO L93 Difference]: Finished difference Result 449 states and 1309 transitions. [2022-01-18 15:24:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:40,005 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:40,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:40,005 INFO L225 Difference]: With dead ends: 449 [2022-01-18 15:24:40,006 INFO L226 Difference]: Without dead ends: 449 [2022-01-18 15:24:40,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:24:40,006 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:40,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 133 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:40,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-01-18 15:24:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 293. [2022-01-18 15:24:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2022-01-18 15:24:40,009 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2022-01-18 15:24:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:40,009 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2022-01-18 15:24:40,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:40,009 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2022-01-18 15:24:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:40,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:40,010 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:40,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Ended with exit code 0 [2022-01-18 15:24:40,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541,541 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:40,210 INFO L402 AbstractCegarLoop]: === Iteration 543 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:40,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:40,210 INFO L85 PathProgramCache]: Analyzing trace with hash 975331284, now seen corresponding path program 541 times [2022-01-18 15:24:40,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:40,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811030616] [2022-01-18 15:24:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:40,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:40,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:40,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811030616] [2022-01-18 15:24:40,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811030616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:40,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4169102] [2022-01-18 15:24:40,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:40,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:40,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:40,297 INFO L229 MonitoredProcess]: Starting monitored process 542 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:40,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Waiting until timeout for monitored process [2022-01-18 15:24:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:40,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:40,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:40,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:24:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:40,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:41,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:41,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:41,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4169102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:41,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:41,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:41,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383902580] [2022-01-18 15:24:41,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:41,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:41,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:41,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:41,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:41,067 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:41,448 INFO L93 Difference]: Finished difference Result 662 states and 1855 transitions. [2022-01-18 15:24:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:41,449 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:41,449 INFO L225 Difference]: With dead ends: 662 [2022-01-18 15:24:41,450 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 15:24:41,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:41,450 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 185 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:41,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 212 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 15:24:41,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 305. [2022-01-18 15:24:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.023026315789474) internal successors, (919), 304 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 919 transitions. [2022-01-18 15:24:41,454 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 919 transitions. Word has length 20 [2022-01-18 15:24:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:41,454 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 919 transitions. [2022-01-18 15:24:41,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 919 transitions. [2022-01-18 15:24:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:41,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:41,455 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:41,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:41,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2022-01-18 15:24:41,655 INFO L402 AbstractCegarLoop]: === Iteration 544 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:41,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1857408718, now seen corresponding path program 542 times [2022-01-18 15:24:41,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:41,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966567325] [2022-01-18 15:24:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:41,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:41,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:41,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966567325] [2022-01-18 15:24:41,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966567325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:41,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431826609] [2022-01-18 15:24:41,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:41,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:41,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:41,741 INFO L229 MonitoredProcess]: Starting monitored process 543 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:41,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Waiting until timeout for monitored process [2022-01-18 15:24:42,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:42,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:42,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:42,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-01-18 15:24:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:42,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:42,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:42,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:42,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431826609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:42,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:42,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:42,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877784971] [2022-01-18 15:24:42,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:42,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:42,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:42,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:42,490 INFO L87 Difference]: Start difference. First operand 305 states and 919 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:42,829 INFO L93 Difference]: Finished difference Result 639 states and 1798 transitions. [2022-01-18 15:24:42,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:24:42,829 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:42,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:42,830 INFO L225 Difference]: With dead ends: 639 [2022-01-18 15:24:42,830 INFO L226 Difference]: Without dead ends: 633 [2022-01-18 15:24:42,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:24:42,830 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 146 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:42,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 215 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:42,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-18 15:24:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 308. [2022-01-18 15:24:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.0) internal successors, (921), 307 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2022-01-18 15:24:42,834 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2022-01-18 15:24:42,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:42,834 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2022-01-18 15:24:42,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2022-01-18 15:24:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:42,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:42,835 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:42,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:43,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2022-01-18 15:24:43,035 INFO L402 AbstractCegarLoop]: === Iteration 545 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:43,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:43,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1716228618, now seen corresponding path program 543 times [2022-01-18 15:24:43,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:43,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604252620] [2022-01-18 15:24:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:43,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:43,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:43,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604252620] [2022-01-18 15:24:43,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604252620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:43,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464878553] [2022-01-18 15:24:43,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:43,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:43,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:43,128 INFO L229 MonitoredProcess]: Starting monitored process 544 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:43,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Waiting until timeout for monitored process [2022-01-18 15:24:43,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:24:43,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:43,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:43,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:43,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:24:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:43,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:43,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:43,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:43,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464878553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:43,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:43,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:43,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149229296] [2022-01-18 15:24:43,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:43,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:43,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:43,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:43,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:43,888 INFO L87 Difference]: Start difference. First operand 308 states and 921 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:44,266 INFO L93 Difference]: Finished difference Result 668 states and 1895 transitions. [2022-01-18 15:24:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:44,266 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:44,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:44,267 INFO L225 Difference]: With dead ends: 668 [2022-01-18 15:24:44,267 INFO L226 Difference]: Without dead ends: 668 [2022-01-18 15:24:44,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=620, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:44,267 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 205 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:44,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 202 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-01-18 15:24:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 311. [2022-01-18 15:24:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0193548387096776) internal successors, (936), 310 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 936 transitions. [2022-01-18 15:24:44,271 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 936 transitions. Word has length 20 [2022-01-18 15:24:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:44,272 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 936 transitions. [2022-01-18 15:24:44,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 936 transitions. [2022-01-18 15:24:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:44,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:44,272 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:44,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Ended with exit code 0 [2022-01-18 15:24:44,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2022-01-18 15:24:44,472 INFO L402 AbstractCegarLoop]: === Iteration 546 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:44,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:44,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1584363058, now seen corresponding path program 544 times [2022-01-18 15:24:44,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:44,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820111365] [2022-01-18 15:24:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:44,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:44,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:44,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820111365] [2022-01-18 15:24:44,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820111365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:44,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578098280] [2022-01-18 15:24:44,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:44,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:44,563 INFO L229 MonitoredProcess]: Starting monitored process 545 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:44,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Waiting until timeout for monitored process [2022-01-18 15:24:44,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:44,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:44,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:44,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:45,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:24:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:45,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:45,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:45,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:45,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578098280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:45,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:45,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:45,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273522768] [2022-01-18 15:24:45,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:45,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:45,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:45,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:45,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:45,304 INFO L87 Difference]: Start difference. First operand 311 states and 936 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:45,806 INFO L93 Difference]: Finished difference Result 664 states and 1884 transitions. [2022-01-18 15:24:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:24:45,806 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:45,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:45,807 INFO L225 Difference]: With dead ends: 664 [2022-01-18 15:24:45,807 INFO L226 Difference]: Without dead ends: 664 [2022-01-18 15:24:45,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:24:45,807 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 178 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:45,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 273 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:24:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-18 15:24:45,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 308. [2022-01-18 15:24:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.0) internal successors, (921), 307 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2022-01-18 15:24:45,812 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2022-01-18 15:24:45,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:45,812 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2022-01-18 15:24:45,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:45,812 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2022-01-18 15:24:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:45,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:45,812 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:45,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Ended with exit code 0 [2022-01-18 15:24:46,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2022-01-18 15:24:46,013 INFO L402 AbstractCegarLoop]: === Iteration 547 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:46,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:46,013 INFO L85 PathProgramCache]: Analyzing trace with hash -603909926, now seen corresponding path program 545 times [2022-01-18 15:24:46,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:46,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115138861] [2022-01-18 15:24:46,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:46,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:46,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:46,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115138861] [2022-01-18 15:24:46,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115138861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:46,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869755602] [2022-01-18 15:24:46,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:46,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:46,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:46,100 INFO L229 MonitoredProcess]: Starting monitored process 546 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:46,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Waiting until timeout for monitored process [2022-01-18 15:24:46,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:24:46,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:46,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:46,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:46,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:24:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:46,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:46,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:46,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:46,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869755602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:46,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:46,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:46,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258431510] [2022-01-18 15:24:46,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:46,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:46,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:46,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:46,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:46,808 INFO L87 Difference]: Start difference. First operand 308 states and 921 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:47,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:47,164 INFO L93 Difference]: Finished difference Result 656 states and 1847 transitions. [2022-01-18 15:24:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:47,164 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:47,165 INFO L225 Difference]: With dead ends: 656 [2022-01-18 15:24:47,165 INFO L226 Difference]: Without dead ends: 650 [2022-01-18 15:24:47,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:47,166 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 200 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:47,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 160 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-18 15:24:47,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 312. [2022-01-18 15:24:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0064308681672025) internal successors, (935), 311 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:47,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2022-01-18 15:24:47,170 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2022-01-18 15:24:47,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:47,170 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2022-01-18 15:24:47,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2022-01-18 15:24:47,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:47,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:47,170 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:47,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Ended with exit code 0 [2022-01-18 15:24:47,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2022-01-18 15:24:47,371 INFO L402 AbstractCegarLoop]: === Iteration 548 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:47,371 INFO L85 PathProgramCache]: Analyzing trace with hash -580010012, now seen corresponding path program 546 times [2022-01-18 15:24:47,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:47,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962087839] [2022-01-18 15:24:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:47,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:47,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:47,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962087839] [2022-01-18 15:24:47,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962087839] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:47,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255623384] [2022-01-18 15:24:47,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:47,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:47,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:47,462 INFO L229 MonitoredProcess]: Starting monitored process 547 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:47,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Waiting until timeout for monitored process [2022-01-18 15:24:47,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:47,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:47,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:47,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:47,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-01-18 15:24:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:48,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:48,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:48,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:48,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255623384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:48,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:48,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:48,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314159903] [2022-01-18 15:24:48,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:48,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:48,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:48,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:48,196 INFO L87 Difference]: Start difference. First operand 312 states and 935 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:48,676 INFO L93 Difference]: Finished difference Result 662 states and 1868 transitions. [2022-01-18 15:24:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:24:48,676 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:48,677 INFO L225 Difference]: With dead ends: 662 [2022-01-18 15:24:48,677 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 15:24:48,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:24:48,677 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 137 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:48,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 262 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 15:24:48,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 309. [2022-01-18 15:24:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0032467532467533) internal successors, (925), 308 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2022-01-18 15:24:48,682 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2022-01-18 15:24:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:48,682 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2022-01-18 15:24:48,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2022-01-18 15:24:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:48,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:48,682 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:48,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Ended with exit code 0 [2022-01-18 15:24:48,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 547 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2022-01-18 15:24:48,883 INFO L402 AbstractCegarLoop]: === Iteration 549 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:48,883 INFO L85 PathProgramCache]: Analyzing trace with hash 448771440, now seen corresponding path program 547 times [2022-01-18 15:24:48,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:48,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272865149] [2022-01-18 15:24:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:48,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:48,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:48,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272865149] [2022-01-18 15:24:48,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272865149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:48,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392920465] [2022-01-18 15:24:48,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:48,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:48,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:48,973 INFO L229 MonitoredProcess]: Starting monitored process 548 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:48,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Waiting until timeout for monitored process [2022-01-18 15:24:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:49,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:49,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:49,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:24:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:49,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:49,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:49,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:49,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392920465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:49,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:49,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:49,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477608384] [2022-01-18 15:24:49,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:49,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:49,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:49,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:49,708 INFO L87 Difference]: Start difference. First operand 309 states and 925 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:49,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:49,947 INFO L93 Difference]: Finished difference Result 613 states and 1782 transitions. [2022-01-18 15:24:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:49,948 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:49,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:49,948 INFO L225 Difference]: With dead ends: 613 [2022-01-18 15:24:49,948 INFO L226 Difference]: Without dead ends: 613 [2022-01-18 15:24:49,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:24:49,949 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:49,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 142 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-18 15:24:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 315. [2022-01-18 15:24:49,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.031847133757962) internal successors, (952), 314 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 952 transitions. [2022-01-18 15:24:49,953 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 952 transitions. Word has length 20 [2022-01-18 15:24:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:49,953 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 952 transitions. [2022-01-18 15:24:49,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 952 transitions. [2022-01-18 15:24:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:49,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:49,954 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:49,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:50,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,548 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:50,154 INFO L402 AbstractCegarLoop]: === Iteration 550 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:50,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:50,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1443147060, now seen corresponding path program 548 times [2022-01-18 15:24:50,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:50,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33174257] [2022-01-18 15:24:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:50,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:50,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:50,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33174257] [2022-01-18 15:24:50,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33174257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:50,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386348009] [2022-01-18 15:24:50,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:50,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:50,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:50,255 INFO L229 MonitoredProcess]: Starting monitored process 549 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:50,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Waiting until timeout for monitored process [2022-01-18 15:24:50,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:50,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:50,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:50,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:50,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:24:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:50,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:50,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:50,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:50,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386348009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:50,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:50,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:50,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58494957] [2022-01-18 15:24:50,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:50,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:50,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:50,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:50,997 INFO L87 Difference]: Start difference. First operand 315 states and 952 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:51,352 INFO L93 Difference]: Finished difference Result 634 states and 1820 transitions. [2022-01-18 15:24:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:51,353 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:51,353 INFO L225 Difference]: With dead ends: 634 [2022-01-18 15:24:51,353 INFO L226 Difference]: Without dead ends: 634 [2022-01-18 15:24:51,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:51,354 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 183 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:51,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 180 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-18 15:24:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 312. [2022-01-18 15:24:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.012861736334405) internal successors, (937), 311 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2022-01-18 15:24:51,358 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 20 [2022-01-18 15:24:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:51,358 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2022-01-18 15:24:51,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2022-01-18 15:24:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:51,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:51,359 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:51,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:51,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 549 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2022-01-18 15:24:51,559 INFO L402 AbstractCegarLoop]: === Iteration 551 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:51,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:51,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1147719878, now seen corresponding path program 549 times [2022-01-18 15:24:51,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:51,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9493767] [2022-01-18 15:24:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:51,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:51,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:51,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9493767] [2022-01-18 15:24:51,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9493767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:51,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844171985] [2022-01-18 15:24:51,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:51,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:51,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:51,650 INFO L229 MonitoredProcess]: Starting monitored process 550 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:51,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Waiting until timeout for monitored process [2022-01-18 15:24:51,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:24:51,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:51,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:51,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:52,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:52,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:52,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:52,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844171985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:52,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:52,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:52,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144007673] [2022-01-18 15:24:52,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:52,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:52,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:52,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:52,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:52,383 INFO L87 Difference]: Start difference. First operand 312 states and 937 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:52,656 INFO L93 Difference]: Finished difference Result 556 states and 1627 transitions. [2022-01-18 15:24:52,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:52,656 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:52,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:52,657 INFO L225 Difference]: With dead ends: 556 [2022-01-18 15:24:52,657 INFO L226 Difference]: Without dead ends: 556 [2022-01-18 15:24:52,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:24:52,657 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:52,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 193 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-18 15:24:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 309. [2022-01-18 15:24:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0032467532467533) internal successors, (925), 308 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2022-01-18 15:24:52,661 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2022-01-18 15:24:52,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:52,661 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2022-01-18 15:24:52,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:52,661 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2022-01-18 15:24:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:52,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:52,662 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:52,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Ended with exit code 0 [2022-01-18 15:24:52,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,550 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:52,862 INFO L402 AbstractCegarLoop]: === Iteration 552 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:52,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:52,862 INFO L85 PathProgramCache]: Analyzing trace with hash 311171562, now seen corresponding path program 550 times [2022-01-18 15:24:52,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:52,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854030748] [2022-01-18 15:24:52,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:52,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:52,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:52,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854030748] [2022-01-18 15:24:52,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854030748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:52,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940325862] [2022-01-18 15:24:52,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:24:52,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:52,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:52,945 INFO L229 MonitoredProcess]: Starting monitored process 551 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:52,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Waiting until timeout for monitored process [2022-01-18 15:24:53,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:24:53,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:53,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:53,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:53,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:24:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:53,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:53,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:53,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:53,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940325862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:53,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:53,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:24:53,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618137121] [2022-01-18 15:24:53,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:53,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:24:53,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:24:53,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:24:53,625 INFO L87 Difference]: Start difference. First operand 309 states and 925 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:53,875 INFO L93 Difference]: Finished difference Result 595 states and 1706 transitions. [2022-01-18 15:24:53,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:53,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:53,876 INFO L225 Difference]: With dead ends: 595 [2022-01-18 15:24:53,876 INFO L226 Difference]: Without dead ends: 589 [2022-01-18 15:24:53,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:24:53,876 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 108 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:53,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 160 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-18 15:24:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 317. [2022-01-18 15:24:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.009493670886076) internal successors, (951), 316 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 951 transitions. [2022-01-18 15:24:53,880 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 951 transitions. Word has length 20 [2022-01-18 15:24:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:53,880 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 951 transitions. [2022-01-18 15:24:53,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 951 transitions. [2022-01-18 15:24:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:53,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:53,881 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:53,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:54,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2022-01-18 15:24:54,081 INFO L402 AbstractCegarLoop]: === Iteration 553 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:54,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:54,081 INFO L85 PathProgramCache]: Analyzing trace with hash 335071476, now seen corresponding path program 551 times [2022-01-18 15:24:54,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:54,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559450381] [2022-01-18 15:24:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:54,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:54,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:54,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559450381] [2022-01-18 15:24:54,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559450381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:54,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801109667] [2022-01-18 15:24:54,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:24:54,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:54,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:54,167 INFO L229 MonitoredProcess]: Starting monitored process 552 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:54,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Waiting until timeout for monitored process [2022-01-18 15:24:54,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:24:54,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:54,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:54,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:54,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:24:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:54,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:54,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:54,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:54,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801109667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:54,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:54,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:54,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366393908] [2022-01-18 15:24:54,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:54,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:54,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:54,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:54,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:54,889 INFO L87 Difference]: Start difference. First operand 317 states and 951 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:55,161 INFO L93 Difference]: Finished difference Result 601 states and 1727 transitions. [2022-01-18 15:24:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:24:55,161 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:55,162 INFO L225 Difference]: With dead ends: 601 [2022-01-18 15:24:55,162 INFO L226 Difference]: Without dead ends: 601 [2022-01-18 15:24:55,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:24:55,162 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 185 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:55,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 164 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-18 15:24:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 313. [2022-01-18 15:24:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.003205128205128) internal successors, (937), 312 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2022-01-18 15:24:55,166 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2022-01-18 15:24:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:55,166 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2022-01-18 15:24:55,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2022-01-18 15:24:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:55,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:55,167 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:55,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Forceful destruction successful, exit code 0 [2022-01-18 15:24:55,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2022-01-18 15:24:55,367 INFO L402 AbstractCegarLoop]: === Iteration 554 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:55,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1818206414, now seen corresponding path program 552 times [2022-01-18 15:24:55,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:55,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884709109] [2022-01-18 15:24:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:55,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:55,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:55,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884709109] [2022-01-18 15:24:55,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884709109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:55,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828451279] [2022-01-18 15:24:55,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:24:55,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:55,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:55,453 INFO L229 MonitoredProcess]: Starting monitored process 553 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:55,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Waiting until timeout for monitored process [2022-01-18 15:24:55,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:24:55,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:55,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:55,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:55,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:56,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:56,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:56,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828451279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:56,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:56,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:56,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196709412] [2022-01-18 15:24:56,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:56,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:56,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:56,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:56,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:56,159 INFO L87 Difference]: Start difference. First operand 313 states and 937 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:56,414 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2022-01-18 15:24:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:56,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:56,415 INFO L225 Difference]: With dead ends: 576 [2022-01-18 15:24:56,415 INFO L226 Difference]: Without dead ends: 576 [2022-01-18 15:24:56,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:24:56,415 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:56,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 152 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:24:56,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-18 15:24:56,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 310. [2022-01-18 15:24:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0032362459546924) internal successors, (928), 309 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 928 transitions. [2022-01-18 15:24:56,419 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 928 transitions. Word has length 20 [2022-01-18 15:24:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:56,419 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 928 transitions. [2022-01-18 15:24:56,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 928 transitions. [2022-01-18 15:24:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:56,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:56,420 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:56,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Ended with exit code 0 [2022-01-18 15:24:56,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2022-01-18 15:24:56,620 INFO L402 AbstractCegarLoop]: === Iteration 555 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:56,620 INFO L85 PathProgramCache]: Analyzing trace with hash -612006650, now seen corresponding path program 553 times [2022-01-18 15:24:56,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:56,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393297690] [2022-01-18 15:24:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:56,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:56,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:56,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393297690] [2022-01-18 15:24:56,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393297690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:56,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979652857] [2022-01-18 15:24:56,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:24:56,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:56,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:56,708 INFO L229 MonitoredProcess]: Starting monitored process 554 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:56,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Waiting until timeout for monitored process [2022-01-18 15:24:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:57,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:57,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:57,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:24:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:57,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:57,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:57,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:57,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979652857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:57,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:57,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:57,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673240454] [2022-01-18 15:24:57,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:57,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:57,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:57,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:57,429 INFO L87 Difference]: Start difference. First operand 310 states and 928 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:57,695 INFO L93 Difference]: Finished difference Result 600 states and 1738 transitions. [2022-01-18 15:24:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:24:57,695 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:57,696 INFO L225 Difference]: With dead ends: 600 [2022-01-18 15:24:57,696 INFO L226 Difference]: Without dead ends: 600 [2022-01-18 15:24:57,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:24:57,696 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 125 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:57,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 190 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-18 15:24:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 313. [2022-01-18 15:24:57,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.003205128205128) internal successors, (937), 312 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2022-01-18 15:24:57,700 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2022-01-18 15:24:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:57,701 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2022-01-18 15:24:57,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2022-01-18 15:24:57,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:57,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:57,701 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:57,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Ended with exit code 0 [2022-01-18 15:24:57,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2022-01-18 15:24:57,901 INFO L402 AbstractCegarLoop]: === Iteration 556 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:57,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:57,902 INFO L85 PathProgramCache]: Analyzing trace with hash 382368970, now seen corresponding path program 554 times [2022-01-18 15:24:57,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:57,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670446222] [2022-01-18 15:24:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:57,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:57,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:57,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670446222] [2022-01-18 15:24:57,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670446222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:57,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222311846] [2022-01-18 15:24:57,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:24:57,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:57,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:57,986 INFO L229 MonitoredProcess]: Starting monitored process 555 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:57,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Waiting until timeout for monitored process [2022-01-18 15:24:58,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:24:58,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:58,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:58,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:58,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-18 15:24:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:58,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:24:58,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:24:58,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:24:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:58,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222311846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:24:58,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:24:58,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:24:58,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774572819] [2022-01-18 15:24:58,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:24:58,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:24:58,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:24:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:24:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:24:58,722 INFO L87 Difference]: Start difference. First operand 313 states and 937 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:24:59,104 INFO L93 Difference]: Finished difference Result 635 states and 1813 transitions. [2022-01-18 15:24:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:24:59,104 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:24:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:24:59,105 INFO L225 Difference]: With dead ends: 635 [2022-01-18 15:24:59,105 INFO L226 Difference]: Without dead ends: 635 [2022-01-18 15:24:59,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:24:59,105 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 158 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:24:59,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 229 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:24:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-01-18 15:24:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 310. [2022-01-18 15:24:59,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.983818770226537) internal successors, (922), 309 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 922 transitions. [2022-01-18 15:24:59,110 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 922 transitions. Word has length 20 [2022-01-18 15:24:59,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:24:59,110 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 922 transitions. [2022-01-18 15:24:59,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:24:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 922 transitions. [2022-01-18 15:24:59,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:24:59,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:24:59,110 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:24:59,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Ended with exit code 0 [2022-01-18 15:24:59,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,555 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:59,311 INFO L402 AbstractCegarLoop]: === Iteration 557 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:24:59,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:24:59,311 INFO L85 PathProgramCache]: Analyzing trace with hash 86941788, now seen corresponding path program 555 times [2022-01-18 15:24:59,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:24:59,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329282483] [2022-01-18 15:24:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:24:59,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:24:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:24:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:59,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:24:59,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329282483] [2022-01-18 15:24:59,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329282483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:24:59,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162464298] [2022-01-18 15:24:59,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:24:59,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:24:59,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:24:59,393 INFO L229 MonitoredProcess]: Starting monitored process 556 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:24:59,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Waiting until timeout for monitored process [2022-01-18 15:24:59,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:24:59,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:24:59,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:24:59,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:24:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:24:59,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:00,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:00,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:00,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162464298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:00,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:00,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 15:25:00,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778006690] [2022-01-18 15:25:00,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:00,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:25:00,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:00,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:25:00,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:00,095 INFO L87 Difference]: Start difference. First operand 310 states and 922 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:00,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:00,349 INFO L93 Difference]: Finished difference Result 547 states and 1591 transitions. [2022-01-18 15:25:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:00,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:00,350 INFO L225 Difference]: With dead ends: 547 [2022-01-18 15:25:00,350 INFO L226 Difference]: Without dead ends: 547 [2022-01-18 15:25:00,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:25:00,351 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 133 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:00,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 173 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:00,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-18 15:25:00,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 297. [2022-01-18 15:25:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9763513513513513) internal successors, (881), 296 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2022-01-18 15:25:00,355 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2022-01-18 15:25:00,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:00,355 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2022-01-18 15:25:00,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:00,355 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2022-01-18 15:25:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:00,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:00,355 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:00,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Ended with exit code 0 [2022-01-18 15:25:00,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2022-01-18 15:25:00,556 INFO L402 AbstractCegarLoop]: === Iteration 558 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:00,556 INFO L85 PathProgramCache]: Analyzing trace with hash -675145266, now seen corresponding path program 556 times [2022-01-18 15:25:00,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:00,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915326663] [2022-01-18 15:25:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:00,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:00,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:00,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915326663] [2022-01-18 15:25:00,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915326663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:00,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586655178] [2022-01-18 15:25:00,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:00,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:00,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:00,660 INFO L229 MonitoredProcess]: Starting monitored process 557 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:00,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Waiting until timeout for monitored process [2022-01-18 15:25:00,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:00,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:00,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:00,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:01,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:01,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:01,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:01,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586655178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:01,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:01,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:25:01,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424234036] [2022-01-18 15:25:01,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:01,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:25:01,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:01,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:25:01,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:01,326 INFO L87 Difference]: Start difference. First operand 297 states and 881 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:01,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:01,574 INFO L93 Difference]: Finished difference Result 570 states and 1633 transitions. [2022-01-18 15:25:01,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:01,575 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:01,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:01,575 INFO L225 Difference]: With dead ends: 570 [2022-01-18 15:25:01,575 INFO L226 Difference]: Without dead ends: 570 [2022-01-18 15:25:01,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:25:01,576 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 156 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:01,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 163 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-18 15:25:01,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 294. [2022-01-18 15:25:01,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:01,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2022-01-18 15:25:01,580 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2022-01-18 15:25:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:01,580 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2022-01-18 15:25:01,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:01,580 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2022-01-18 15:25:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:01,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:01,580 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:01,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:01,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 557 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2022-01-18 15:25:01,781 INFO L402 AbstractCegarLoop]: === Iteration 559 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:01,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:01,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1810384618, now seen corresponding path program 557 times [2022-01-18 15:25:01,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:01,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283076147] [2022-01-18 15:25:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:01,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:01,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:01,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283076147] [2022-01-18 15:25:01,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283076147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:01,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187536790] [2022-01-18 15:25:01,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:01,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:01,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:01,855 INFO L229 MonitoredProcess]: Starting monitored process 558 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:01,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Waiting until timeout for monitored process [2022-01-18 15:25:02,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:25:02,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:02,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:02,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:02,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:02,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:02,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:02,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:02,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187536790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:02,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:02,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:25:02,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164317817] [2022-01-18 15:25:02,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:02,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:25:02,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:02,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:25:02,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:25:02,506 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:02,770 INFO L93 Difference]: Finished difference Result 635 states and 1777 transitions. [2022-01-18 15:25:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:02,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:02,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:02,771 INFO L225 Difference]: With dead ends: 635 [2022-01-18 15:25:02,771 INFO L226 Difference]: Without dead ends: 629 [2022-01-18 15:25:02,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:25:02,771 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 109 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:02,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 147 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:02,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-18 15:25:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 312. [2022-01-18 15:25:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9581993569131835) internal successors, (920), 311 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 920 transitions. [2022-01-18 15:25:02,776 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 920 transitions. Word has length 20 [2022-01-18 15:25:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:02,776 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 920 transitions. [2022-01-18 15:25:02,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:02,776 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 920 transitions. [2022-01-18 15:25:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:02,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:02,776 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:02,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:02,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2022-01-18 15:25:02,977 INFO L402 AbstractCegarLoop]: === Iteration 560 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:02,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1786484704, now seen corresponding path program 558 times [2022-01-18 15:25:02,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:02,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588589953] [2022-01-18 15:25:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:02,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:03,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:03,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588589953] [2022-01-18 15:25:03,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588589953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:03,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371201376] [2022-01-18 15:25:03,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:03,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:03,053 INFO L229 MonitoredProcess]: Starting monitored process 559 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:03,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Waiting until timeout for monitored process [2022-01-18 15:25:03,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:25:03,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:03,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:03,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:03,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:03,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:03,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:03,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371201376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:03,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:03,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:25:03,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069181263] [2022-01-18 15:25:03,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:03,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:25:03,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:03,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:25:03,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:03,715 INFO L87 Difference]: Start difference. First operand 312 states and 920 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:04,050 INFO L93 Difference]: Finished difference Result 641 states and 1798 transitions. [2022-01-18 15:25:04,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:25:04,051 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:04,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:04,051 INFO L225 Difference]: With dead ends: 641 [2022-01-18 15:25:04,051 INFO L226 Difference]: Without dead ends: 641 [2022-01-18 15:25:04,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:25:04,052 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 128 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:04,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 166 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:04,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-01-18 15:25:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 310. [2022-01-18 15:25:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9611650485436893) internal successors, (915), 309 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 915 transitions. [2022-01-18 15:25:04,056 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 915 transitions. Word has length 20 [2022-01-18 15:25:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:04,056 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 915 transitions. [2022-01-18 15:25:04,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 915 transitions. [2022-01-18 15:25:04,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:04,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:04,057 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:04,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Ended with exit code 0 [2022-01-18 15:25:04,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2022-01-18 15:25:04,257 INFO L402 AbstractCegarLoop]: === Iteration 561 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:04,257 INFO L85 PathProgramCache]: Analyzing trace with hash -303349766, now seen corresponding path program 559 times [2022-01-18 15:25:04,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:04,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100910091] [2022-01-18 15:25:04,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:04,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:04,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:04,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100910091] [2022-01-18 15:25:04,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100910091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:04,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571284089] [2022-01-18 15:25:04,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:04,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:04,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:04,334 INFO L229 MonitoredProcess]: Starting monitored process 560 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:04,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Waiting until timeout for monitored process [2022-01-18 15:25:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:04,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:04,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:04,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:04,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:04,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:04,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571284089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:04,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:04,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:25:04,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066444222] [2022-01-18 15:25:04,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:04,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:25:04,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:04,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:25:04,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:04,977 INFO L87 Difference]: Start difference. First operand 310 states and 915 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:05,252 INFO L93 Difference]: Finished difference Result 624 states and 1770 transitions. [2022-01-18 15:25:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:05,252 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:05,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:05,253 INFO L225 Difference]: With dead ends: 624 [2022-01-18 15:25:05,253 INFO L226 Difference]: Without dead ends: 624 [2022-01-18 15:25:05,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:25:05,253 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 103 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:05,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 147 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:05,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-18 15:25:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 308. [2022-01-18 15:25:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.964169381107492) internal successors, (910), 307 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 910 transitions. [2022-01-18 15:25:05,259 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 910 transitions. Word has length 20 [2022-01-18 15:25:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:05,259 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 910 transitions. [2022-01-18 15:25:05,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 910 transitions. [2022-01-18 15:25:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:05,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:05,259 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:05,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:05,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,560 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:05,467 INFO L402 AbstractCegarLoop]: === Iteration 562 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1879188900, now seen corresponding path program 560 times [2022-01-18 15:25:05,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:05,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923758840] [2022-01-18 15:25:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:05,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:05,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:05,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923758840] [2022-01-18 15:25:05,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923758840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:05,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158777689] [2022-01-18 15:25:05,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:05,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:05,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:05,541 INFO L229 MonitoredProcess]: Starting monitored process 561 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:05,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Waiting until timeout for monitored process [2022-01-18 15:25:05,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:05,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:05,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:05,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:06,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:06,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:06,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:06,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158777689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:06,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:06,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:25:06,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411591814] [2022-01-18 15:25:06,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:06,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:25:06,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:06,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:25:06,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:25:06,168 INFO L87 Difference]: Start difference. First operand 308 states and 910 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:06,438 INFO L93 Difference]: Finished difference Result 649 states and 1824 transitions. [2022-01-18 15:25:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:06,439 INFO L225 Difference]: With dead ends: 649 [2022-01-18 15:25:06,439 INFO L226 Difference]: Without dead ends: 649 [2022-01-18 15:25:06,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:06,439 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 114 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:06,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 194 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:06,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-18 15:25:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 293. [2022-01-18 15:25:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:06,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2022-01-18 15:25:06,443 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2022-01-18 15:25:06,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:06,443 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2022-01-18 15:25:06,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:06,443 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2022-01-18 15:25:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:06,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:06,444 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:06,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Ended with exit code 0 [2022-01-18 15:25:06,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,561 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:06,644 INFO L402 AbstractCegarLoop]: === Iteration 563 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:06,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1252570894, now seen corresponding path program 561 times [2022-01-18 15:25:06,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:06,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717053345] [2022-01-18 15:25:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:06,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:06,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:06,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717053345] [2022-01-18 15:25:06,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717053345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:06,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199156930] [2022-01-18 15:25:06,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:06,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:06,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:06,706 INFO L229 MonitoredProcess]: Starting monitored process 562 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:06,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Waiting until timeout for monitored process [2022-01-18 15:25:07,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:25:07,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:07,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:07,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:07,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:07,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:07,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199156930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:07,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:07,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:25:07,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355405012] [2022-01-18 15:25:07,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:07,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:25:07,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:07,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:25:07,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:25:07,319 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:07,519 INFO L93 Difference]: Finished difference Result 446 states and 1280 transitions. [2022-01-18 15:25:07,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:07,519 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:07,520 INFO L225 Difference]: With dead ends: 446 [2022-01-18 15:25:07,520 INFO L226 Difference]: Without dead ends: 434 [2022-01-18 15:25:07,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:07,520 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:07,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 104 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:07,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-01-18 15:25:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2022-01-18 15:25:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.953020134228188) internal successors, (880), 298 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2022-01-18 15:25:07,523 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2022-01-18 15:25:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:07,523 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2022-01-18 15:25:07,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2022-01-18 15:25:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:07,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:07,524 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:07,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:07,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2022-01-18 15:25:07,724 INFO L402 AbstractCegarLoop]: === Iteration 564 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1993468228, now seen corresponding path program 562 times [2022-01-18 15:25:07,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:07,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760000431] [2022-01-18 15:25:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:07,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:07,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:07,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760000431] [2022-01-18 15:25:07,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760000431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:07,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632895867] [2022-01-18 15:25:07,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:07,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:07,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:07,789 INFO L229 MonitoredProcess]: Starting monitored process 563 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:07,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Waiting until timeout for monitored process [2022-01-18 15:25:08,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:08,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:08,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:08,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:08,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:25:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:08,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:08,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:08,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:08,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632895867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:08,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:08,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:25:08,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684667674] [2022-01-18 15:25:08,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:08,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:25:08,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:08,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:25:08,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:25:08,442 INFO L87 Difference]: Start difference. First operand 299 states and 880 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:08,693 INFO L93 Difference]: Finished difference Result 471 states and 1332 transitions. [2022-01-18 15:25:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:25:08,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:08,694 INFO L225 Difference]: With dead ends: 471 [2022-01-18 15:25:08,694 INFO L226 Difference]: Without dead ends: 465 [2022-01-18 15:25:08,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:25:08,694 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:08,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 121 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-18 15:25:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 309. [2022-01-18 15:25:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-01-18 15:25:08,698 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2022-01-18 15:25:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:08,698 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-01-18 15:25:08,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-01-18 15:25:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:08,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:08,698 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:08,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Ended with exit code 0 [2022-01-18 15:25:08,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2022-01-18 15:25:08,899 INFO L402 AbstractCegarLoop]: === Iteration 565 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:08,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:08,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2017368142, now seen corresponding path program 563 times [2022-01-18 15:25:08,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:08,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600478630] [2022-01-18 15:25:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:08,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:08,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:08,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600478630] [2022-01-18 15:25:08,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600478630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:08,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820132276] [2022-01-18 15:25:08,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:08,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:08,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:08,966 INFO L229 MonitoredProcess]: Starting monitored process 564 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:08,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (564)] Waiting until timeout for monitored process [2022-01-18 15:25:09,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:25:09,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:09,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:09,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:09,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:25:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:09,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:09,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:09,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:09,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820132276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:09,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:09,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:25:09,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875913265] [2022-01-18 15:25:09,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:09,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:25:09,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:09,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:25:09,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:25:09,622 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:09,857 INFO L93 Difference]: Finished difference Result 442 states and 1278 transitions. [2022-01-18 15:25:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:09,858 INFO L225 Difference]: With dead ends: 442 [2022-01-18 15:25:09,858 INFO L226 Difference]: Without dead ends: 442 [2022-01-18 15:25:09,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:25:09,858 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:09,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 147 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:09,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-18 15:25:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 297. [2022-01-18 15:25:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.956081081081081) internal successors, (875), 296 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2022-01-18 15:25:09,862 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2022-01-18 15:25:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:09,862 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2022-01-18 15:25:09,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2022-01-18 15:25:09,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:09,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:09,862 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:09,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (564)] Ended with exit code 0 [2022-01-18 15:25:10,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2022-01-18 15:25:10,062 INFO L402 AbstractCegarLoop]: === Iteration 566 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:10,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:10,063 INFO L85 PathProgramCache]: Analyzing trace with hash 726011050, now seen corresponding path program 564 times [2022-01-18 15:25:10,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:10,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304509094] [2022-01-18 15:25:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:10,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:10,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:10,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304509094] [2022-01-18 15:25:10,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304509094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:10,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851765099] [2022-01-18 15:25:10,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:10,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:10,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:10,128 INFO L229 MonitoredProcess]: Starting monitored process 565 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:10,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (565)] Waiting until timeout for monitored process [2022-01-18 15:25:10,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:25:10,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:10,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:10,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:10,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:10,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:10,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:10,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:25:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:10,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851765099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:10,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:10,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:25:10,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771962373] [2022-01-18 15:25:10,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:10,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:25:10,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:10,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:25:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:25:10,722 INFO L87 Difference]: Start difference. First operand 297 states and 875 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:10,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:10,925 INFO L93 Difference]: Finished difference Result 477 states and 1347 transitions. [2022-01-18 15:25:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:10,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:10,926 INFO L225 Difference]: With dead ends: 477 [2022-01-18 15:25:10,926 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 15:25:10,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:10,926 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 65 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:10,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 161 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 15:25:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 311. [2022-01-18 15:25:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9483870967741934) internal successors, (914), 310 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2022-01-18 15:25:10,930 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2022-01-18 15:25:10,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:10,930 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2022-01-18 15:25:10,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2022-01-18 15:25:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:10,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:10,930 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:10,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (565)] Ended with exit code 0 [2022-01-18 15:25:11,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 565 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2022-01-18 15:25:11,130 INFO L402 AbstractCegarLoop]: === Iteration 567 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:11,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:11,131 INFO L85 PathProgramCache]: Analyzing trace with hash 749910964, now seen corresponding path program 565 times [2022-01-18 15:25:11,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:11,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88129469] [2022-01-18 15:25:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:11,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:11,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:11,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88129469] [2022-01-18 15:25:11,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88129469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:11,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643283252] [2022-01-18 15:25:11,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:11,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:11,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:11,197 INFO L229 MonitoredProcess]: Starting monitored process 566 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:11,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Waiting until timeout for monitored process [2022-01-18 15:25:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:11,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:11,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:11,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:11,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:11,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:11,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:25:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:11,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643283252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:11,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:11,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:25:11,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906840676] [2022-01-18 15:25:11,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:11,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:25:11,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:11,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:25:11,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:25:11,782 INFO L87 Difference]: Start difference. First operand 311 states and 914 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:11,979 INFO L93 Difference]: Finished difference Result 477 states and 1353 transitions. [2022-01-18 15:25:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:25:11,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:11,980 INFO L225 Difference]: With dead ends: 477 [2022-01-18 15:25:11,980 INFO L226 Difference]: Without dead ends: 477 [2022-01-18 15:25:11,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:25:11,980 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 120 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:11,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 132 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-18 15:25:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 309. [2022-01-18 15:25:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9512987012987013) internal successors, (909), 308 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2022-01-18 15:25:11,984 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2022-01-18 15:25:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:11,984 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2022-01-18 15:25:11,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2022-01-18 15:25:11,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:11,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:11,985 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:12,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Ended with exit code 0 [2022-01-18 15:25:12,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2022-01-18 15:25:12,185 INFO L402 AbstractCegarLoop]: === Iteration 568 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:12,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:12,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2061921394, now seen corresponding path program 566 times [2022-01-18 15:25:12,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:12,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262654977] [2022-01-18 15:25:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:12,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:12,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:12,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262654977] [2022-01-18 15:25:12,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262654977] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:12,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373696139] [2022-01-18 15:25:12,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:12,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:12,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:12,252 INFO L229 MonitoredProcess]: Starting monitored process 567 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:12,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (567)] Waiting until timeout for monitored process [2022-01-18 15:25:12,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:12,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:12,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:12,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:12,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:12,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:12,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:25:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:12,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373696139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:12,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:12,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:25:12,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814668982] [2022-01-18 15:25:12,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:12,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:25:12,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:25:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:25:12,822 INFO L87 Difference]: Start difference. First operand 309 states and 909 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:13,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:13,055 INFO L93 Difference]: Finished difference Result 452 states and 1303 transitions. [2022-01-18 15:25:13,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:13,055 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:13,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:13,056 INFO L225 Difference]: With dead ends: 452 [2022-01-18 15:25:13,056 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 15:25:13,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:25:13,056 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:13,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 181 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 15:25:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 295. [2022-01-18 15:25:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9591836734693877) internal successors, (870), 294 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2022-01-18 15:25:13,060 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2022-01-18 15:25:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:13,060 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2022-01-18 15:25:13,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2022-01-18 15:25:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:13,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:13,060 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:13,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (567)] Ended with exit code 0 [2022-01-18 15:25:13,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,567 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:13,260 INFO L402 AbstractCegarLoop]: === Iteration 569 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:13,261 INFO L85 PathProgramCache]: Analyzing trace with hash -334767040, now seen corresponding path program 567 times [2022-01-18 15:25:13,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:13,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015679954] [2022-01-18 15:25:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:13,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:13,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:13,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015679954] [2022-01-18 15:25:13,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015679954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:13,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057705450] [2022-01-18 15:25:13,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:13,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:13,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:13,327 INFO L229 MonitoredProcess]: Starting monitored process 568 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:13,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (568)] Waiting until timeout for monitored process [2022-01-18 15:25:13,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:25:13,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:13,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:13,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:13,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:13,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:13,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:13,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:13,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057705450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:13,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:13,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:25:13,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537515865] [2022-01-18 15:25:13,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:13,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:25:13,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:13,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:25:13,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:25:13,905 INFO L87 Difference]: Start difference. First operand 295 states and 870 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:14,093 INFO L93 Difference]: Finished difference Result 536 states and 1488 transitions. [2022-01-18 15:25:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:14,093 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:14,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:14,094 INFO L225 Difference]: With dead ends: 536 [2022-01-18 15:25:14,094 INFO L226 Difference]: Without dead ends: 530 [2022-01-18 15:25:14,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:14,094 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 118 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:14,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 122 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-18 15:25:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 313. [2022-01-18 15:25:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.951923076923077) internal successors, (921), 312 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 921 transitions. [2022-01-18 15:25:14,098 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 921 transitions. Word has length 20 [2022-01-18 15:25:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:14,098 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 921 transitions. [2022-01-18 15:25:14,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 921 transitions. [2022-01-18 15:25:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:14,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:14,099 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:14,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (568)] Ended with exit code 0 [2022-01-18 15:25:14,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,568 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:14,299 INFO L402 AbstractCegarLoop]: === Iteration 570 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash -310867126, now seen corresponding path program 568 times [2022-01-18 15:25:14,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:14,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525022049] [2022-01-18 15:25:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:14,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:14,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:14,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525022049] [2022-01-18 15:25:14,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525022049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:14,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931274258] [2022-01-18 15:25:14,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:14,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:14,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:14,368 INFO L229 MonitoredProcess]: Starting monitored process 569 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:14,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Waiting until timeout for monitored process [2022-01-18 15:25:14,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:14,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:14,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:14,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:14,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:14,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:14,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:14,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:14,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931274258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:14,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:14,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:25:14,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220302094] [2022-01-18 15:25:14,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:14,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:25:14,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:14,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:25:14,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:25:14,964 INFO L87 Difference]: Start difference. First operand 313 states and 921 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:15,230 INFO L93 Difference]: Finished difference Result 536 states and 1494 transitions. [2022-01-18 15:25:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:25:15,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:15,231 INFO L225 Difference]: With dead ends: 536 [2022-01-18 15:25:15,231 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 15:25:15,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:25:15,231 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:15,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 224 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 15:25:15,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 311. [2022-01-18 15:25:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9548387096774196) internal successors, (916), 310 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2022-01-18 15:25:15,235 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 20 [2022-01-18 15:25:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:15,235 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2022-01-18 15:25:15,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2022-01-18 15:25:15,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:15,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:15,236 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:15,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:15,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2022-01-18 15:25:15,436 INFO L402 AbstractCegarLoop]: === Iteration 571 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1172267812, now seen corresponding path program 569 times [2022-01-18 15:25:15,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:15,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601719953] [2022-01-18 15:25:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:15,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:15,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:15,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601719953] [2022-01-18 15:25:15,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601719953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:15,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690431726] [2022-01-18 15:25:15,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:15,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:15,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:15,503 INFO L229 MonitoredProcess]: Starting monitored process 570 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:15,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (570)] Waiting until timeout for monitored process [2022-01-18 15:25:15,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:25:15,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:15,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:15,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:15,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:16,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:16,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:16,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690431726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:16,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:16,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:25:16,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596967890] [2022-01-18 15:25:16,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:16,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:25:16,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:25:16,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:25:16,056 INFO L87 Difference]: Start difference. First operand 311 states and 916 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:16,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:16,258 INFO L93 Difference]: Finished difference Result 525 states and 1481 transitions. [2022-01-18 15:25:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:16,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:16,259 INFO L225 Difference]: With dead ends: 525 [2022-01-18 15:25:16,259 INFO L226 Difference]: Without dead ends: 525 [2022-01-18 15:25:16,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:16,260 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:16,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 148 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-18 15:25:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 309. [2022-01-18 15:25:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.957792207792208) internal successors, (911), 308 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 911 transitions. [2022-01-18 15:25:16,263 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 911 transitions. Word has length 20 [2022-01-18 15:25:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:16,263 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 911 transitions. [2022-01-18 15:25:16,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 911 transitions. [2022-01-18 15:25:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:16,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:16,264 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:16,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (570)] Ended with exit code 0 [2022-01-18 15:25:16,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,570 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:16,464 INFO L402 AbstractCegarLoop]: === Iteration 572 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:16,464 INFO L85 PathProgramCache]: Analyzing trace with hash -940160818, now seen corresponding path program 570 times [2022-01-18 15:25:16,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:16,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848612328] [2022-01-18 15:25:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:16,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:16,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:16,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848612328] [2022-01-18 15:25:16,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848612328] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:16,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123574162] [2022-01-18 15:25:16,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:16,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:16,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:16,527 INFO L229 MonitoredProcess]: Starting monitored process 571 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:16,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (571)] Waiting until timeout for monitored process [2022-01-18 15:25:16,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:25:16,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:16,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:16,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:16,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:17,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:17,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:17,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123574162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:17,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:17,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:25:17,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35573368] [2022-01-18 15:25:17,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:17,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:17,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:17,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:17,056 INFO L87 Difference]: Start difference. First operand 309 states and 911 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:17,277 INFO L93 Difference]: Finished difference Result 515 states and 1454 transitions. [2022-01-18 15:25:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:17,278 INFO L225 Difference]: With dead ends: 515 [2022-01-18 15:25:17,278 INFO L226 Difference]: Without dead ends: 515 [2022-01-18 15:25:17,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:25:17,278 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 85 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:17,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 193 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-18 15:25:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 292. [2022-01-18 15:25:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9587628865979383) internal successors, (861), 291 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:17,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2022-01-18 15:25:17,282 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2022-01-18 15:25:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:17,282 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2022-01-18 15:25:17,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2022-01-18 15:25:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:17,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:17,283 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:17,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (571)] Ended with exit code 0 [2022-01-18 15:25:17,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,571 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:17,483 INFO L402 AbstractCegarLoop]: === Iteration 573 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:17,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:17,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1400890582, now seen corresponding path program 571 times [2022-01-18 15:25:17,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:17,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982107536] [2022-01-18 15:25:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:17,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:17,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:17,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982107536] [2022-01-18 15:25:17,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982107536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:17,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701984443] [2022-01-18 15:25:17,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:17,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:17,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:17,537 INFO L229 MonitoredProcess]: Starting monitored process 572 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:17,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Waiting until timeout for monitored process [2022-01-18 15:25:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:17,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:17,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:17,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:17,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:18,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:18,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:18,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701984443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:18,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:18,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 15:25:18,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823482352] [2022-01-18 15:25:18,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:18,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:25:18,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:25:18,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:25:18,081 INFO L87 Difference]: Start difference. First operand 292 states and 861 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:18,282 INFO L93 Difference]: Finished difference Result 491 states and 1372 transitions. [2022-01-18 15:25:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:18,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:18,282 INFO L225 Difference]: With dead ends: 491 [2022-01-18 15:25:18,283 INFO L226 Difference]: Without dead ends: 473 [2022-01-18 15:25:18,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:18,283 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 116 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:18,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 93 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-01-18 15:25:18,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 298. [2022-01-18 15:25:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9494949494949494) internal successors, (876), 297 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2022-01-18 15:25:18,286 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2022-01-18 15:25:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:18,286 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2022-01-18 15:25:18,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2022-01-18 15:25:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:18,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:18,287 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:18,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Ended with exit code 0 [2022-01-18 15:25:18,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,572 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:18,487 INFO L402 AbstractCegarLoop]: === Iteration 574 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1304206338, now seen corresponding path program 572 times [2022-01-18 15:25:18,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:18,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524990523] [2022-01-18 15:25:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:18,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:18,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:18,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524990523] [2022-01-18 15:25:18,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524990523] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:18,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628455525] [2022-01-18 15:25:18,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:18,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:18,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:18,545 INFO L229 MonitoredProcess]: Starting monitored process 573 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:18,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (573)] Waiting until timeout for monitored process [2022-01-18 15:25:18,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:18,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:18,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:18,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:18,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:19,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:19,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:19,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628455525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:19,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:19,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:25:19,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603619818] [2022-01-18 15:25:19,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:19,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:19,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:19,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:19,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:19,134 INFO L87 Difference]: Start difference. First operand 298 states and 876 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:19,393 INFO L93 Difference]: Finished difference Result 487 states and 1364 transitions. [2022-01-18 15:25:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:19,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:19,394 INFO L225 Difference]: With dead ends: 487 [2022-01-18 15:25:19,394 INFO L226 Difference]: Without dead ends: 475 [2022-01-18 15:25:19,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:19,394 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:19,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 119 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-18 15:25:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 300. [2022-01-18 15:25:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9464882943143813) internal successors, (881), 299 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2022-01-18 15:25:19,398 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2022-01-18 15:25:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:19,398 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2022-01-18 15:25:19,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2022-01-18 15:25:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:19,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:19,398 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:19,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (573)] Ended with exit code 0 [2022-01-18 15:25:19,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable573,573 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:19,598 INFO L402 AbstractCegarLoop]: === Iteration 575 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:19,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:19,599 INFO L85 PathProgramCache]: Analyzing trace with hash -563309004, now seen corresponding path program 573 times [2022-01-18 15:25:19,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:19,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500234390] [2022-01-18 15:25:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:19,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:19,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:19,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500234390] [2022-01-18 15:25:19,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500234390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:19,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196249429] [2022-01-18 15:25:19,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:19,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:19,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:19,671 INFO L229 MonitoredProcess]: Starting monitored process 574 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:19,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (574)] Waiting until timeout for monitored process [2022-01-18 15:25:19,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:25:19,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:19,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:20,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:25:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:20,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:20,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:20,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:20,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196249429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:20,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:20,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:25:20,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125722797] [2022-01-18 15:25:20,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:20,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:25:20,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:20,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:25:20,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:25:20,282 INFO L87 Difference]: Start difference. First operand 300 states and 881 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:20,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:20,692 INFO L93 Difference]: Finished difference Result 512 states and 1416 transitions. [2022-01-18 15:25:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:25:20,693 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:20,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:20,693 INFO L225 Difference]: With dead ends: 512 [2022-01-18 15:25:20,693 INFO L226 Difference]: Without dead ends: 506 [2022-01-18 15:25:20,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:25:20,693 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 109 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:20,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 191 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:20,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-18 15:25:20,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 310. [2022-01-18 15:25:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9385113268608416) internal successors, (908), 309 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2022-01-18 15:25:20,697 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2022-01-18 15:25:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:20,697 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2022-01-18 15:25:20,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2022-01-18 15:25:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:20,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:20,698 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:20,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (574)] Ended with exit code 0 [2022-01-18 15:25:20,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2022-01-18 15:25:20,898 INFO L402 AbstractCegarLoop]: === Iteration 576 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:20,899 INFO L85 PathProgramCache]: Analyzing trace with hash -539409090, now seen corresponding path program 574 times [2022-01-18 15:25:20,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:20,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499275024] [2022-01-18 15:25:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:20,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:20,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:20,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499275024] [2022-01-18 15:25:20,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499275024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:20,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762806237] [2022-01-18 15:25:20,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:20,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:20,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:20,960 INFO L229 MonitoredProcess]: Starting monitored process 575 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:20,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (575)] Waiting until timeout for monitored process [2022-01-18 15:25:21,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:21,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:21,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:21,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:21,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:25:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:21,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:21,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:21,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:21,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762806237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:21,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:21,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:25:21,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825045119] [2022-01-18 15:25:21,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:21,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:25:21,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:21,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:25:21,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:25:21,597 INFO L87 Difference]: Start difference. First operand 310 states and 908 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:21,854 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2022-01-18 15:25:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:21,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:21,854 INFO L225 Difference]: With dead ends: 483 [2022-01-18 15:25:21,854 INFO L226 Difference]: Without dead ends: 483 [2022-01-18 15:25:21,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:25:21,855 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:21,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 126 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-18 15:25:21,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 296. [2022-01-18 15:25:21,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.952542372881356) internal successors, (871), 295 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2022-01-18 15:25:21,858 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2022-01-18 15:25:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:21,858 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2022-01-18 15:25:21,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:21,858 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2022-01-18 15:25:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:21,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:21,859 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:21,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (575)] Ended with exit code 0 [2022-01-18 15:25:22,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2022-01-18 15:25:22,059 INFO L402 AbstractCegarLoop]: === Iteration 577 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:22,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:22,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1728517574, now seen corresponding path program 575 times [2022-01-18 15:25:22,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:22,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263286886] [2022-01-18 15:25:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:22,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:22,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263286886] [2022-01-18 15:25:22,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263286886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383931947] [2022-01-18 15:25:22,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:22,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:22,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:22,117 INFO L229 MonitoredProcess]: Starting monitored process 576 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:22,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Waiting until timeout for monitored process [2022-01-18 15:25:22,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:22,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:22,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:22,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:22,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:22,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:22,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:22,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:22,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383931947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:22,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:22,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:25:22,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738357560] [2022-01-18 15:25:22,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:22,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:25:22,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:25:22,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:25:22,710 INFO L87 Difference]: Start difference. First operand 296 states and 871 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:22,902 INFO L93 Difference]: Finished difference Result 432 states and 1233 transitions. [2022-01-18 15:25:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:22,903 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:22,903 INFO L225 Difference]: With dead ends: 432 [2022-01-18 15:25:22,903 INFO L226 Difference]: Without dead ends: 420 [2022-01-18 15:25:22,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:25:22,903 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:22,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 99 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-18 15:25:22,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 300. [2022-01-18 15:25:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9464882943143813) internal successors, (881), 299 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:22,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2022-01-18 15:25:22,907 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2022-01-18 15:25:22,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:22,907 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2022-01-18 15:25:22,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:22,907 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2022-01-18 15:25:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:22,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:22,907 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:22,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Ended with exit code 0 [2022-01-18 15:25:23,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2022-01-18 15:25:23,108 INFO L402 AbstractCegarLoop]: === Iteration 578 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash -987620240, now seen corresponding path program 576 times [2022-01-18 15:25:23,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:23,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814626770] [2022-01-18 15:25:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:23,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:23,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:23,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814626770] [2022-01-18 15:25:23,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814626770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:23,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173206619] [2022-01-18 15:25:23,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:23,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:23,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:23,165 INFO L229 MonitoredProcess]: Starting monitored process 577 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:23,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (577)] Waiting until timeout for monitored process [2022-01-18 15:25:23,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:25:23,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:23,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:23,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:23,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:25:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:23,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:23,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:23,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:23,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173206619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:23,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:23,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:25:23,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061920211] [2022-01-18 15:25:23,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:23,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:23,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:23,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:23,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:23,786 INFO L87 Difference]: Start difference. First operand 300 states and 881 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:24,018 INFO L93 Difference]: Finished difference Result 457 states and 1285 transitions. [2022-01-18 15:25:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:25:24,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:24,019 INFO L225 Difference]: With dead ends: 457 [2022-01-18 15:25:24,019 INFO L226 Difference]: Without dead ends: 451 [2022-01-18 15:25:24,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:25:24,019 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 111 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:24,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 103 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-18 15:25:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 310. [2022-01-18 15:25:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9385113268608416) internal successors, (908), 309 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2022-01-18 15:25:24,023 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2022-01-18 15:25:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:24,023 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2022-01-18 15:25:24,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2022-01-18 15:25:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:24,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:24,030 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:24,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (577)] Ended with exit code 0 [2022-01-18 15:25:24,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,577 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:24,233 INFO L402 AbstractCegarLoop]: === Iteration 579 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash -963720326, now seen corresponding path program 577 times [2022-01-18 15:25:24,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:24,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549254436] [2022-01-18 15:25:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:24,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:24,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549254436] [2022-01-18 15:25:24,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549254436] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854055901] [2022-01-18 15:25:24,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:24,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:24,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:24,293 INFO L229 MonitoredProcess]: Starting monitored process 578 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:24,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (578)] Waiting until timeout for monitored process [2022-01-18 15:25:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:24,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:24,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-18 15:25:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:24,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:24,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:24,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:24,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854055901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:24,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:24,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:25:24,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819310650] [2022-01-18 15:25:24,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:24,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:25:24,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:24,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:25:24,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:25:24,920 INFO L87 Difference]: Start difference. First operand 310 states and 908 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:25,151 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2022-01-18 15:25:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:25,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:25,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:25,152 INFO L225 Difference]: With dead ends: 428 [2022-01-18 15:25:25,152 INFO L226 Difference]: Without dead ends: 428 [2022-01-18 15:25:25,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:25,152 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:25,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 138 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:25,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-18 15:25:25,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 298. [2022-01-18 15:25:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9494949494949494) internal successors, (876), 297 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2022-01-18 15:25:25,155 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2022-01-18 15:25:25,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:25,155 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2022-01-18 15:25:25,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:25,155 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2022-01-18 15:25:25,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:25,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:25,156 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:25,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (578)] Ended with exit code 0 [2022-01-18 15:25:25,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,578 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:25,356 INFO L402 AbstractCegarLoop]: === Iteration 580 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2039889878, now seen corresponding path program 578 times [2022-01-18 15:25:25,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:25,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850040651] [2022-01-18 15:25:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:25,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:25,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:25,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850040651] [2022-01-18 15:25:25,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850040651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:25,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143101002] [2022-01-18 15:25:25,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:25,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:25,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:25,412 INFO L229 MonitoredProcess]: Starting monitored process 579 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:25,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Waiting until timeout for monitored process [2022-01-18 15:25:25,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:25,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:25,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:25,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:25,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:25,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:25,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:25:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:25,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143101002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:25,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:25,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:25:25,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308115961] [2022-01-18 15:25:25,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:25,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:25,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:25,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:25,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:25,965 INFO L87 Difference]: Start difference. First operand 298 states and 876 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:26,146 INFO L93 Difference]: Finished difference Result 463 states and 1300 transitions. [2022-01-18 15:25:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:26,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:26,147 INFO L225 Difference]: With dead ends: 463 [2022-01-18 15:25:26,147 INFO L226 Difference]: Without dead ends: 457 [2022-01-18 15:25:26,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:26,147 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:26,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 110 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-18 15:25:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 312. [2022-01-18 15:25:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.942122186495177) internal successors, (915), 311 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2022-01-18 15:25:26,151 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2022-01-18 15:25:26,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:26,151 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2022-01-18 15:25:26,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2022-01-18 15:25:26,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:26,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:26,151 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:26,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:26,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2022-01-18 15:25:26,351 INFO L402 AbstractCegarLoop]: === Iteration 581 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:26,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2063789792, now seen corresponding path program 579 times [2022-01-18 15:25:26,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:26,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466550289] [2022-01-18 15:25:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:26,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:26,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:26,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466550289] [2022-01-18 15:25:26,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466550289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:26,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135056028] [2022-01-18 15:25:26,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:26,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:26,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:26,410 INFO L229 MonitoredProcess]: Starting monitored process 580 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:26,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (580)] Waiting until timeout for monitored process [2022-01-18 15:25:26,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:25:26,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:26,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:26,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:26,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:26,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:26,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:25:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:26,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135056028] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:26,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:26,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:25:26,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423710839] [2022-01-18 15:25:26,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:26,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:25:26,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:26,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:25:26,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:25:26,981 INFO L87 Difference]: Start difference. First operand 312 states and 915 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:27,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:27,216 INFO L93 Difference]: Finished difference Result 463 states and 1306 transitions. [2022-01-18 15:25:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:25:27,217 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:27,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:27,217 INFO L225 Difference]: With dead ends: 463 [2022-01-18 15:25:27,217 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 15:25:27,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:25:27,218 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:27,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 156 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:27,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 15:25:27,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 310. [2022-01-18 15:25:27,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9449838187702264) internal successors, (910), 309 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2022-01-18 15:25:27,221 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2022-01-18 15:25:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:27,221 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2022-01-18 15:25:27,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2022-01-18 15:25:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:27,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:27,222 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:27,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (580)] Ended with exit code 0 [2022-01-18 15:25:27,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,580 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:27,427 INFO L402 AbstractCegarLoop]: === Iteration 582 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:27,427 INFO L85 PathProgramCache]: Analyzing trace with hash -748042566, now seen corresponding path program 580 times [2022-01-18 15:25:27,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:27,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914856602] [2022-01-18 15:25:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:27,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:27,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:27,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914856602] [2022-01-18 15:25:27,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914856602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:27,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866225230] [2022-01-18 15:25:27,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:27,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:27,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:27,487 INFO L229 MonitoredProcess]: Starting monitored process 581 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:27,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (581)] Waiting until timeout for monitored process [2022-01-18 15:25:27,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:27,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:27,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:27,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:27,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:27,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:27,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:25:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:28,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866225230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:28,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:28,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:25:28,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315767508] [2022-01-18 15:25:28,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:28,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:28,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:28,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:28,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:28,018 INFO L87 Difference]: Start difference. First operand 310 states and 910 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:28,215 INFO L93 Difference]: Finished difference Result 438 states and 1256 transitions. [2022-01-18 15:25:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:28,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:28,216 INFO L225 Difference]: With dead ends: 438 [2022-01-18 15:25:28,216 INFO L226 Difference]: Without dead ends: 438 [2022-01-18 15:25:28,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:28,216 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:28,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 126 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-18 15:25:28,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 294. [2022-01-18 15:25:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.955631399317406) internal successors, (866), 293 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2022-01-18 15:25:28,219 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2022-01-18 15:25:28,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:28,219 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2022-01-18 15:25:28,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:28,219 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2022-01-18 15:25:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:28,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:28,220 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:28,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (581)] Ended with exit code 0 [2022-01-18 15:25:28,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,581 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:28,420 INFO L402 AbstractCegarLoop]: === Iteration 583 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:28,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:28,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2028956866, now seen corresponding path program 581 times [2022-01-18 15:25:28,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:28,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033814585] [2022-01-18 15:25:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:28,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:28,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:28,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033814585] [2022-01-18 15:25:28,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033814585] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:28,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60977267] [2022-01-18 15:25:28,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:28,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:28,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:28,475 INFO L229 MonitoredProcess]: Starting monitored process 582 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:28,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (582)] Waiting until timeout for monitored process [2022-01-18 15:25:28,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:28,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:28,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:28,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:28,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:28,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:28,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:28,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:29,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60977267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:29,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:29,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:25:29,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333881769] [2022-01-18 15:25:29,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:29,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:25:29,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:29,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:25:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:25:29,078 INFO L87 Difference]: Start difference. First operand 294 states and 866 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:29,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:29,283 INFO L93 Difference]: Finished difference Result 422 states and 1208 transitions. [2022-01-18 15:25:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:29,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:29,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:29,284 INFO L225 Difference]: With dead ends: 422 [2022-01-18 15:25:29,284 INFO L226 Difference]: Without dead ends: 410 [2022-01-18 15:25:29,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:25:29,284 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:29,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 106 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-01-18 15:25:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 300. [2022-01-18 15:25:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9464882943143813) internal successors, (881), 299 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2022-01-18 15:25:29,288 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2022-01-18 15:25:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:29,288 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2022-01-18 15:25:29,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:29,288 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2022-01-18 15:25:29,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:29,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:29,288 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:29,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (582)] Ended with exit code 0 [2022-01-18 15:25:29,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,582 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:29,488 INFO L402 AbstractCegarLoop]: === Iteration 584 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:29,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1525113096, now seen corresponding path program 582 times [2022-01-18 15:25:29,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:29,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790070163] [2022-01-18 15:25:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:29,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:29,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:29,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790070163] [2022-01-18 15:25:29,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790070163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:29,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41708563] [2022-01-18 15:25:29,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:29,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:29,545 INFO L229 MonitoredProcess]: Starting monitored process 583 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:29,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (583)] Waiting until timeout for monitored process [2022-01-18 15:25:29,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:25:29,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:29,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:29,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:29,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:25:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:30,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:30,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:30,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:30,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41708563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:30,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:30,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:25:30,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659477685] [2022-01-18 15:25:30,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:30,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:30,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:30,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:30,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:30,177 INFO L87 Difference]: Start difference. First operand 300 states and 881 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:30,435 INFO L93 Difference]: Finished difference Result 447 states and 1260 transitions. [2022-01-18 15:25:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:25:30,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:30,436 INFO L225 Difference]: With dead ends: 447 [2022-01-18 15:25:30,436 INFO L226 Difference]: Without dead ends: 441 [2022-01-18 15:25:30,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:25:30,436 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:30,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 132 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-01-18 15:25:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 310. [2022-01-18 15:25:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9385113268608416) internal successors, (908), 309 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2022-01-18 15:25:30,440 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2022-01-18 15:25:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:30,440 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2022-01-18 15:25:30,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2022-01-18 15:25:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:30,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:30,440 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:30,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (583)] Ended with exit code 0 [2022-01-18 15:25:30,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2022-01-18 15:25:30,641 INFO L402 AbstractCegarLoop]: === Iteration 585 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:30,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:30,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1501213182, now seen corresponding path program 583 times [2022-01-18 15:25:30,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:30,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205363007] [2022-01-18 15:25:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:30,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:30,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:30,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205363007] [2022-01-18 15:25:30,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205363007] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:30,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572316561] [2022-01-18 15:25:30,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:30,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:30,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:30,699 INFO L229 MonitoredProcess]: Starting monitored process 584 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:30,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (584)] Waiting until timeout for monitored process [2022-01-18 15:25:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:31,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:31,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:31,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-01-18 15:25:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:31,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:31,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:31,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 15:25:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:31,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572316561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:31,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:31,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:25:31,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284712009] [2022-01-18 15:25:31,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:31,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:25:31,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:31,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:25:31,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:25:31,329 INFO L87 Difference]: Start difference. First operand 310 states and 908 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:31,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:31,505 INFO L93 Difference]: Finished difference Result 418 states and 1206 transitions. [2022-01-18 15:25:31,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:31,505 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:31,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:31,506 INFO L225 Difference]: With dead ends: 418 [2022-01-18 15:25:31,506 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 15:25:31,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:31,506 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 82 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:31,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 74 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:31,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 15:25:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 298. [2022-01-18 15:25:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9494949494949494) internal successors, (876), 297 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2022-01-18 15:25:31,510 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2022-01-18 15:25:31,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:31,510 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2022-01-18 15:25:31,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:31,510 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2022-01-18 15:25:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:31,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:31,510 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:31,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (584)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:31,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2022-01-18 15:25:31,710 INFO L402 AbstractCegarLoop]: === Iteration 586 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:31,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1502397022, now seen corresponding path program 584 times [2022-01-18 15:25:31,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:31,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311976209] [2022-01-18 15:25:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:31,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:31,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:31,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311976209] [2022-01-18 15:25:31,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311976209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:31,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098852686] [2022-01-18 15:25:31,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:31,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:31,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:31,768 INFO L229 MonitoredProcess]: Starting monitored process 585 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:31,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (585)] Waiting until timeout for monitored process [2022-01-18 15:25:32,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:32,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:32,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:32,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:32,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:32,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:32,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:32,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:25:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:32,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098852686] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:32,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:32,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:25:32,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795294602] [2022-01-18 15:25:32,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:32,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:32,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:32,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:32,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:32,329 INFO L87 Difference]: Start difference. First operand 298 states and 876 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:32,516 INFO L93 Difference]: Finished difference Result 453 states and 1275 transitions. [2022-01-18 15:25:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:32,517 INFO L225 Difference]: With dead ends: 453 [2022-01-18 15:25:32,517 INFO L226 Difference]: Without dead ends: 447 [2022-01-18 15:25:32,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:32,517 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:32,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 120 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-18 15:25:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 312. [2022-01-18 15:25:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.942122186495177) internal successors, (915), 311 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2022-01-18 15:25:32,521 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2022-01-18 15:25:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:32,521 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2022-01-18 15:25:32,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2022-01-18 15:25:32,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:32,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:32,521 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:32,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (585)] Ended with exit code 0 [2022-01-18 15:25:32,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2022-01-18 15:25:32,722 INFO L402 AbstractCegarLoop]: === Iteration 587 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:32,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1526296936, now seen corresponding path program 585 times [2022-01-18 15:25:32,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:32,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389473201] [2022-01-18 15:25:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:32,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:32,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389473201] [2022-01-18 15:25:32,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389473201] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858845769] [2022-01-18 15:25:32,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:32,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:32,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:32,782 INFO L229 MonitoredProcess]: Starting monitored process 586 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:32,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (586)] Waiting until timeout for monitored process [2022-01-18 15:25:33,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:25:33,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:33,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:33,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:33,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:33,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:33,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:33,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:25:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:33,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858845769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:33,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:33,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:25:33,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109023453] [2022-01-18 15:25:33,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:33,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:25:33,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:25:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:25:33,363 INFO L87 Difference]: Start difference. First operand 312 states and 915 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:33,621 INFO L93 Difference]: Finished difference Result 453 states and 1281 transitions. [2022-01-18 15:25:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:25:33,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:33,621 INFO L225 Difference]: With dead ends: 453 [2022-01-18 15:25:33,621 INFO L226 Difference]: Without dead ends: 453 [2022-01-18 15:25:33,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:25:33,622 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 114 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:33,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 162 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:33,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-18 15:25:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 310. [2022-01-18 15:25:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9449838187702264) internal successors, (910), 309 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2022-01-18 15:25:33,625 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2022-01-18 15:25:33,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:33,625 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2022-01-18 15:25:33,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:33,625 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2022-01-18 15:25:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:33,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:33,626 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:33,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (586)] Ended with exit code 0 [2022-01-18 15:25:33,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2022-01-18 15:25:33,826 INFO L402 AbstractCegarLoop]: === Iteration 588 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:33,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:33,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1285535422, now seen corresponding path program 586 times [2022-01-18 15:25:33,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:33,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554482760] [2022-01-18 15:25:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:33,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:33,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:33,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554482760] [2022-01-18 15:25:33,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554482760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:33,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037850042] [2022-01-18 15:25:33,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:33,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:33,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:33,884 INFO L229 MonitoredProcess]: Starting monitored process 587 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:33,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Waiting until timeout for monitored process [2022-01-18 15:25:34,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:34,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:34,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:34,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:34,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:34,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:34,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-01-18 15:25:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:34,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037850042] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:34,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:34,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:25:34,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549802778] [2022-01-18 15:25:34,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:34,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:25:34,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:34,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:25:34,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:25:34,430 INFO L87 Difference]: Start difference. First operand 310 states and 910 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:34,618 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2022-01-18 15:25:34,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:34,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:34,619 INFO L225 Difference]: With dead ends: 428 [2022-01-18 15:25:34,619 INFO L226 Difference]: Without dead ends: 428 [2022-01-18 15:25:34,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:34,619 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:34,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 112 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-18 15:25:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 296. [2022-01-18 15:25:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.952542372881356) internal successors, (871), 295 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2022-01-18 15:25:34,623 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2022-01-18 15:25:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:34,623 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2022-01-18 15:25:34,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2022-01-18 15:25:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:34,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:34,623 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:34,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Ended with exit code 0 [2022-01-18 15:25:34,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2022-01-18 15:25:34,823 INFO L402 AbstractCegarLoop]: === Iteration 589 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:34,824 INFO L85 PathProgramCache]: Analyzing trace with hash 441618932, now seen corresponding path program 587 times [2022-01-18 15:25:34,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:34,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250191476] [2022-01-18 15:25:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:34,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:34,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:34,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250191476] [2022-01-18 15:25:34,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250191476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:34,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293416094] [2022-01-18 15:25:34,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:34,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:34,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:34,881 INFO L229 MonitoredProcess]: Starting monitored process 588 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:34,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Waiting until timeout for monitored process [2022-01-18 15:25:35,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:25:35,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:35,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:35,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:35,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:35,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:35,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:35,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:35,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293416094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:35,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:35,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:25:35,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694371848] [2022-01-18 15:25:35,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:35,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:25:35,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:35,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:25:35,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:25:35,425 INFO L87 Difference]: Start difference. First operand 296 states and 871 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:35,654 INFO L93 Difference]: Finished difference Result 504 states and 1396 transitions. [2022-01-18 15:25:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:35,654 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:35,655 INFO L225 Difference]: With dead ends: 504 [2022-01-18 15:25:35,655 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 15:25:35,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:25:35,655 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:35,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 173 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 15:25:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 314. [2022-01-18 15:25:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.9456869009584663) internal successors, (922), 313 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 922 transitions. [2022-01-18 15:25:35,659 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 922 transitions. Word has length 20 [2022-01-18 15:25:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:35,659 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 922 transitions. [2022-01-18 15:25:35,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 922 transitions. [2022-01-18 15:25:35,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:35,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:35,660 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:35,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Ended with exit code 0 [2022-01-18 15:25:35,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 588 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2022-01-18 15:25:35,860 INFO L402 AbstractCegarLoop]: === Iteration 590 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:35,861 INFO L85 PathProgramCache]: Analyzing trace with hash 465518846, now seen corresponding path program 588 times [2022-01-18 15:25:35,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:35,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089996301] [2022-01-18 15:25:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:35,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:35,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:35,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089996301] [2022-01-18 15:25:35,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089996301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:35,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372684796] [2022-01-18 15:25:35,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:35,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:35,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:35,921 INFO L229 MonitoredProcess]: Starting monitored process 589 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:35,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (589)] Waiting until timeout for monitored process [2022-01-18 15:25:36,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:25:36,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:36,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:36,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:36,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:36,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:36,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:36,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:36,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372684796] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:36,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:36,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:25:36,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055520753] [2022-01-18 15:25:36,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:36,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:36,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:36,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:36,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:36,474 INFO L87 Difference]: Start difference. First operand 314 states and 922 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:36,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:36,743 INFO L93 Difference]: Finished difference Result 504 states and 1402 transitions. [2022-01-18 15:25:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:25:36,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:36,743 INFO L225 Difference]: With dead ends: 504 [2022-01-18 15:25:36,743 INFO L226 Difference]: Without dead ends: 504 [2022-01-18 15:25:36,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:25:36,744 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 98 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:36,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 168 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-18 15:25:36,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 312. [2022-01-18 15:25:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9485530546623795) internal successors, (917), 311 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2022-01-18 15:25:36,748 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 20 [2022-01-18 15:25:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:36,748 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2022-01-18 15:25:36,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:36,748 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2022-01-18 15:25:36,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:36,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:36,748 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:36,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (589)] Ended with exit code 0 [2022-01-18 15:25:36,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2022-01-18 15:25:36,949 INFO L402 AbstractCegarLoop]: === Iteration 591 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:36,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:36,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1948653784, now seen corresponding path program 589 times [2022-01-18 15:25:36,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:36,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469255894] [2022-01-18 15:25:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:36,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:37,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:37,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469255894] [2022-01-18 15:25:37,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469255894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:37,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859538068] [2022-01-18 15:25:37,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:37,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:37,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:37,010 INFO L229 MonitoredProcess]: Starting monitored process 590 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:37,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Waiting until timeout for monitored process [2022-01-18 15:25:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:37,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:37,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:37,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:37,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:37,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:37,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859538068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:37,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:37,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:25:37,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138491939] [2022-01-18 15:25:37,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:37,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:37,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:37,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:37,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:37,533 INFO L87 Difference]: Start difference. First operand 312 states and 917 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:37,780 INFO L93 Difference]: Finished difference Result 493 states and 1389 transitions. [2022-01-18 15:25:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:37,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:37,781 INFO L225 Difference]: With dead ends: 493 [2022-01-18 15:25:37,781 INFO L226 Difference]: Without dead ends: 493 [2022-01-18 15:25:37,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:25:37,782 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:37,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 175 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-18 15:25:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 310. [2022-01-18 15:25:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9514563106796117) internal successors, (912), 309 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 912 transitions. [2022-01-18 15:25:37,786 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 912 transitions. Word has length 20 [2022-01-18 15:25:37,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:37,786 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 912 transitions. [2022-01-18 15:25:37,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:37,786 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 912 transitions. [2022-01-18 15:25:37,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:25:37,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:37,786 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:37,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:37,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2022-01-18 15:25:37,986 INFO L402 AbstractCegarLoop]: === Iteration 592 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:37,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:37,987 INFO L85 PathProgramCache]: Analyzing trace with hash -163774846, now seen corresponding path program 590 times [2022-01-18 15:25:37,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:37,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601707985] [2022-01-18 15:25:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:37,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:38,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:38,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601707985] [2022-01-18 15:25:38,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601707985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:38,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791204970] [2022-01-18 15:25:38,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:38,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:38,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:38,043 INFO L229 MonitoredProcess]: Starting monitored process 591 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:38,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Waiting until timeout for monitored process [2022-01-18 15:25:38,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:38,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:38,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:38,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:38,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:38,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 15:25:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:38,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791204970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:38,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:38,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 15:25:38,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141682424] [2022-01-18 15:25:38,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:38,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:25:38,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:38,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:25:38,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:25:38,560 INFO L87 Difference]: Start difference. First operand 310 states and 912 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:38,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:38,766 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2022-01-18 15:25:38,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:38,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:25:38,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:38,767 INFO L225 Difference]: With dead ends: 483 [2022-01-18 15:25:38,767 INFO L226 Difference]: Without dead ends: 483 [2022-01-18 15:25:38,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:38,767 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:38,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 147 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-18 15:25:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 294. [2022-01-18 15:25:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.955631399317406) internal successors, (866), 293 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2022-01-18 15:25:38,770 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2022-01-18 15:25:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:38,771 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2022-01-18 15:25:38,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2022-01-18 15:25:38,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:38,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:38,771 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:38,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:38,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,591 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:38,971 INFO L402 AbstractCegarLoop]: === Iteration 593 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:38,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1181876905, now seen corresponding path program 1 times [2022-01-18 15:25:38,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:38,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135601390] [2022-01-18 15:25:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:38,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:39,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:39,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135601390] [2022-01-18 15:25:39,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135601390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:39,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084980604] [2022-01-18 15:25:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:39,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:39,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:39,015 INFO L229 MonitoredProcess]: Starting monitored process 592 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:39,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Waiting until timeout for monitored process [2022-01-18 15:25:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:39,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:39,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:39,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-01-18 15:25:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:39,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:39,590 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:39,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 7 [2022-01-18 15:25:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:39,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084980604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:39,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:39,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 15:25:39,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277237166] [2022-01-18 15:25:39,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:39,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 15:25:39,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 15:25:39,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:25:39,598 INFO L87 Difference]: Start difference. First operand 294 states and 866 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:39,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:39,801 INFO L93 Difference]: Finished difference Result 431 states and 1262 transitions. [2022-01-18 15:25:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:25:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:39,802 INFO L225 Difference]: With dead ends: 431 [2022-01-18 15:25:39,802 INFO L226 Difference]: Without dead ends: 392 [2022-01-18 15:25:39,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:25:39,802 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:39,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 149 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:39,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-18 15:25:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 335. [2022-01-18 15:25:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.029940119760479) internal successors, (1012), 334 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1012 transitions. [2022-01-18 15:25:39,806 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1012 transitions. Word has length 21 [2022-01-18 15:25:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:39,806 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1012 transitions. [2022-01-18 15:25:39,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1012 transitions. [2022-01-18 15:25:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:39,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:39,806 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:39,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:40,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,592 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:40,007 INFO L402 AbstractCegarLoop]: === Iteration 594 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:40,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1459922641, now seen corresponding path program 2 times [2022-01-18 15:25:40,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:40,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60515649] [2022-01-18 15:25:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:40,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:40,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:40,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60515649] [2022-01-18 15:25:40,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60515649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:40,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394225226] [2022-01-18 15:25:40,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:40,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:40,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:40,053 INFO L229 MonitoredProcess]: Starting monitored process 593 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:40,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (593)] Waiting until timeout for monitored process [2022-01-18 15:25:40,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:40,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:40,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:40,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:40,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-01-18 15:25:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:40,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:40,640 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:40,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 7 [2022-01-18 15:25:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:40,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394225226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:40,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:40,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:25:40,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857187968] [2022-01-18 15:25:40,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:40,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:25:40,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:40,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:25:40,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:25:40,648 INFO L87 Difference]: Start difference. First operand 335 states and 1012 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:40,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:40,866 INFO L93 Difference]: Finished difference Result 594 states and 1763 transitions. [2022-01-18 15:25:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:25:40,866 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:40,867 INFO L225 Difference]: With dead ends: 594 [2022-01-18 15:25:40,867 INFO L226 Difference]: Without dead ends: 555 [2022-01-18 15:25:40,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:25:40,867 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 101 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:40,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 178 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-18 15:25:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 345. [2022-01-18 15:25:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0494186046511627) internal successors, (1049), 344 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1049 transitions. [2022-01-18 15:25:40,871 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1049 transitions. Word has length 21 [2022-01-18 15:25:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:40,871 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1049 transitions. [2022-01-18 15:25:40,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1049 transitions. [2022-01-18 15:25:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:40,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:40,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:40,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (593)] Ended with exit code 0 [2022-01-18 15:25:41,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable593 [2022-01-18 15:25:41,072 INFO L402 AbstractCegarLoop]: === Iteration 595 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:41,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1035305321, now seen corresponding path program 3 times [2022-01-18 15:25:41,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:41,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639832291] [2022-01-18 15:25:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:41,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:41,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:41,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639832291] [2022-01-18 15:25:41,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639832291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:41,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778891214] [2022-01-18 15:25:41,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:41,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:41,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:41,175 INFO L229 MonitoredProcess]: Starting monitored process 594 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:41,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Waiting until timeout for monitored process [2022-01-18 15:25:41,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:25:41,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:41,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:41,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:41,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 111 [2022-01-18 15:25:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:41,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:41,948 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:41,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 7 [2022-01-18 15:25:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:41,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778891214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:41,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:41,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-01-18 15:25:41,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851148037] [2022-01-18 15:25:41,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:41,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:25:41,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:25:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:41,956 INFO L87 Difference]: Start difference. First operand 345 states and 1049 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:43,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:43,326 INFO L93 Difference]: Finished difference Result 830 states and 2343 transitions. [2022-01-18 15:25:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:25:43,326 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:43,327 INFO L225 Difference]: With dead ends: 830 [2022-01-18 15:25:43,327 INFO L226 Difference]: Without dead ends: 743 [2022-01-18 15:25:43,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=333, Invalid=1737, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:25:43,327 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 220 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:43,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 696 Invalid, 2434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:25:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-18 15:25:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 351. [2022-01-18 15:25:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.065714285714286) internal successors, (1073), 350 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1073 transitions. [2022-01-18 15:25:43,332 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1073 transitions. Word has length 21 [2022-01-18 15:25:43,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:43,332 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1073 transitions. [2022-01-18 15:25:43,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1073 transitions. [2022-01-18 15:25:43,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:43,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:43,333 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:43,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:43,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,594 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:43,533 INFO L402 AbstractCegarLoop]: === Iteration 596 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:43,533 INFO L85 PathProgramCache]: Analyzing trace with hash -153227887, now seen corresponding path program 4 times [2022-01-18 15:25:43,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:43,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410398778] [2022-01-18 15:25:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:43,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:43,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410398778] [2022-01-18 15:25:43,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410398778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151749931] [2022-01-18 15:25:43,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:43,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:43,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:43,586 INFO L229 MonitoredProcess]: Starting monitored process 595 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:43,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (595)] Waiting until timeout for monitored process [2022-01-18 15:25:43,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:43,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:43,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:43,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:43,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2022-01-18 15:25:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:44,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:44,236 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:25:44,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 7 [2022-01-18 15:25:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:44,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151749931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:44,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:44,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:25:44,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620145397] [2022-01-18 15:25:44,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:44,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:25:44,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:25:44,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:25:44,244 INFO L87 Difference]: Start difference. First operand 351 states and 1073 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:44,515 INFO L93 Difference]: Finished difference Result 473 states and 1369 transitions. [2022-01-18 15:25:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:25:44,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:44,515 INFO L225 Difference]: With dead ends: 473 [2022-01-18 15:25:44,515 INFO L226 Difference]: Without dead ends: 422 [2022-01-18 15:25:44,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:25:44,516 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 95 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:44,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 170 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-18 15:25:44,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 348. [2022-01-18 15:25:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.0518731988472623) internal successors, (1059), 347 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1059 transitions. [2022-01-18 15:25:44,519 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1059 transitions. Word has length 21 [2022-01-18 15:25:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:44,519 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1059 transitions. [2022-01-18 15:25:44,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1059 transitions. [2022-01-18 15:25:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:44,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:44,520 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:44,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (595)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:44,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595,595 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:44,737 INFO L402 AbstractCegarLoop]: === Iteration 597 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1351909717, now seen corresponding path program 5 times [2022-01-18 15:25:44,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:44,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334827627] [2022-01-18 15:25:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:44,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:44,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:44,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334827627] [2022-01-18 15:25:44,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334827627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:44,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291983679] [2022-01-18 15:25:44,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:44,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:44,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:44,784 INFO L229 MonitoredProcess]: Starting monitored process 596 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:44,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (596)] Waiting until timeout for monitored process [2022-01-18 15:25:45,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:45,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:45,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:45,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-01-18 15:25:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:45,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:45,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:45,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:25:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:45,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291983679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:45,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:45,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:25:45,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076839885] [2022-01-18 15:25:45,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:45,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:45,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:45,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:45,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:45,417 INFO L87 Difference]: Start difference. First operand 348 states and 1059 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:45,596 INFO L93 Difference]: Finished difference Result 533 states and 1599 transitions. [2022-01-18 15:25:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:25:45,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:45,597 INFO L225 Difference]: With dead ends: 533 [2022-01-18 15:25:45,597 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 15:25:45,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:25:45,597 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 102 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:45,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 146 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 15:25:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 368. [2022-01-18 15:25:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.087193460490463) internal successors, (1133), 367 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1133 transitions. [2022-01-18 15:25:45,601 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1133 transitions. Word has length 21 [2022-01-18 15:25:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:45,602 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1133 transitions. [2022-01-18 15:25:45,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1133 transitions. [2022-01-18 15:25:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:45,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:45,602 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:45,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (596)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:45,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596,596 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:45,802 INFO L402 AbstractCegarLoop]: === Iteration 598 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash 447829617, now seen corresponding path program 6 times [2022-01-18 15:25:45,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:45,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429433370] [2022-01-18 15:25:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:45,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:45,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:45,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429433370] [2022-01-18 15:25:45,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429433370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:45,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481502426] [2022-01-18 15:25:45,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:45,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:45,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:45,884 INFO L229 MonitoredProcess]: Starting monitored process 597 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:45,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (597)] Waiting until timeout for monitored process [2022-01-18 15:25:46,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:25:46,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:46,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:46,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:46,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2022-01-18 15:25:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:46,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:46,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:46,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:25:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:46,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481502426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:46,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:46,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-01-18 15:25:46,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672285863] [2022-01-18 15:25:46,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:46,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:25:46,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:46,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:25:46,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:25:46,638 INFO L87 Difference]: Start difference. First operand 368 states and 1133 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:47,245 INFO L93 Difference]: Finished difference Result 798 states and 2277 transitions. [2022-01-18 15:25:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:25:47,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:47,246 INFO L225 Difference]: With dead ends: 798 [2022-01-18 15:25:47,246 INFO L226 Difference]: Without dead ends: 693 [2022-01-18 15:25:47,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:25:47,246 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 183 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:47,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 267 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:25:47,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-01-18 15:25:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 374. [2022-01-18 15:25:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.1018766756032172) internal successors, (1157), 373 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1157 transitions. [2022-01-18 15:25:47,251 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1157 transitions. Word has length 21 [2022-01-18 15:25:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:47,251 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1157 transitions. [2022-01-18 15:25:47,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1157 transitions. [2022-01-18 15:25:47,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:47,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:47,252 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:47,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (597)] Ended with exit code 0 [2022-01-18 15:25:47,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2022-01-18 15:25:47,463 INFO L402 AbstractCegarLoop]: === Iteration 599 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:47,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1329907051, now seen corresponding path program 7 times [2022-01-18 15:25:47,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:47,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936973655] [2022-01-18 15:25:47,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:47,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:47,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:47,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936973655] [2022-01-18 15:25:47,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936973655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:47,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825411465] [2022-01-18 15:25:47,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:47,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:47,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:47,514 INFO L229 MonitoredProcess]: Starting monitored process 598 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:47,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Waiting until timeout for monitored process [2022-01-18 15:25:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:47,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:47,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2022-01-18 15:25:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:48,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:48,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:48,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:25:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:48,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825411465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:48,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:48,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:25:48,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162352318] [2022-01-18 15:25:48,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:48,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:48,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:48,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:48,214 INFO L87 Difference]: Start difference. First operand 374 states and 1157 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:48,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:48,449 INFO L93 Difference]: Finished difference Result 551 states and 1634 transitions. [2022-01-18 15:25:48,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:25:48,449 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:48,450 INFO L225 Difference]: With dead ends: 551 [2022-01-18 15:25:48,450 INFO L226 Difference]: Without dead ends: 500 [2022-01-18 15:25:48,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:25:48,450 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 112 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:48,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 136 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-01-18 15:25:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 358. [2022-01-18 15:25:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.070028011204482) internal successors, (1096), 357 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1096 transitions. [2022-01-18 15:25:48,454 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1096 transitions. Word has length 21 [2022-01-18 15:25:48,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:48,454 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1096 transitions. [2022-01-18 15:25:48,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:48,454 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1096 transitions. [2022-01-18 15:25:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:48,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:48,455 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:48,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Ended with exit code 0 [2022-01-18 15:25:48,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 598 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2022-01-18 15:25:48,655 INFO L402 AbstractCegarLoop]: === Iteration 600 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:48,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:48,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1658954503, now seen corresponding path program 8 times [2022-01-18 15:25:48,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:48,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383318934] [2022-01-18 15:25:48,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:48,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:48,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:48,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383318934] [2022-01-18 15:25:48,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383318934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:48,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365957712] [2022-01-18 15:25:48,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:48,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:48,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:48,718 INFO L229 MonitoredProcess]: Starting monitored process 599 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:48,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (599)] Waiting until timeout for monitored process [2022-01-18 15:25:49,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:49,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:49,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:49,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2022-01-18 15:25:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:49,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:49,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:49,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 130 [2022-01-18 15:25:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:49,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365957712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:49,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:49,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:25:49,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182500615] [2022-01-18 15:25:49,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:49,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:49,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:49,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:49,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:49,537 INFO L87 Difference]: Start difference. First operand 358 states and 1096 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:49,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:49,847 INFO L93 Difference]: Finished difference Result 546 states and 1598 transitions. [2022-01-18 15:25:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:49,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:49,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:49,848 INFO L225 Difference]: With dead ends: 546 [2022-01-18 15:25:49,848 INFO L226 Difference]: Without dead ends: 468 [2022-01-18 15:25:49,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:25:49,848 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 110 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:49,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 145 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-18 15:25:49,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 370. [2022-01-18 15:25:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.100271002710027) internal successors, (1144), 369 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1144 transitions. [2022-01-18 15:25:49,852 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1144 transitions. Word has length 21 [2022-01-18 15:25:49,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:49,852 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1144 transitions. [2022-01-18 15:25:49,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:49,852 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1144 transitions. [2022-01-18 15:25:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:49,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:49,853 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:49,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (599)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:50,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2022-01-18 15:25:50,053 INFO L402 AbstractCegarLoop]: === Iteration 601 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:50,053 INFO L85 PathProgramCache]: Analyzing trace with hash -776877069, now seen corresponding path program 9 times [2022-01-18 15:25:50,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:50,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064720494] [2022-01-18 15:25:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:50,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:50,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:50,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064720494] [2022-01-18 15:25:50,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064720494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:50,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879621230] [2022-01-18 15:25:50,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:50,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:50,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:50,119 INFO L229 MonitoredProcess]: Starting monitored process 600 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:50,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Waiting until timeout for monitored process [2022-01-18 15:25:50,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:25:50,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:50,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:50,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:50,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:50,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:50,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 130 [2022-01-18 15:25:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:50,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879621230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:50,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:50,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:25:50,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072614855] [2022-01-18 15:25:50,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:50,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:50,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:50,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:50,899 INFO L87 Difference]: Start difference. First operand 370 states and 1144 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:51,280 INFO L93 Difference]: Finished difference Result 519 states and 1515 transitions. [2022-01-18 15:25:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:51,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:51,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:51,281 INFO L225 Difference]: With dead ends: 519 [2022-01-18 15:25:51,281 INFO L226 Difference]: Without dead ends: 468 [2022-01-18 15:25:51,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:25:51,281 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:51,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 158 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:51,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-18 15:25:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 364. [2022-01-18 15:25:51,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.0853994490358128) internal successors, (1120), 363 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1120 transitions. [2022-01-18 15:25:51,285 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1120 transitions. Word has length 21 [2022-01-18 15:25:51,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:51,285 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1120 transitions. [2022-01-18 15:25:51,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:51,285 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1120 transitions. [2022-01-18 15:25:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:51,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:51,285 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:51,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:51,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2022-01-18 15:25:51,486 INFO L402 AbstractCegarLoop]: === Iteration 602 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:51,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:51,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1312106871, now seen corresponding path program 10 times [2022-01-18 15:25:51,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:51,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047284337] [2022-01-18 15:25:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:51,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:25:51,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:51,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047284337] [2022-01-18 15:25:51,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047284337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:51,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247622214] [2022-01-18 15:25:51,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:51,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:51,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:51,590 INFO L229 MonitoredProcess]: Starting monitored process 601 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:51,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (601)] Waiting until timeout for monitored process [2022-01-18 15:25:51,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:25:51,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:51,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:51,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:52,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 15:25:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:52,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:52,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:52,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-01-18 15:25:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:52,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247622214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:52,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:52,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2022-01-18 15:25:52,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780185391] [2022-01-18 15:25:52,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:52,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:25:52,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:52,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:25:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:25:52,313 INFO L87 Difference]: Start difference. First operand 364 states and 1120 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:53,471 INFO L93 Difference]: Finished difference Result 631 states and 1814 transitions. [2022-01-18 15:25:53,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:25:53,471 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:53,472 INFO L225 Difference]: With dead ends: 631 [2022-01-18 15:25:53,472 INFO L226 Difference]: Without dead ends: 492 [2022-01-18 15:25:53,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:25:53,472 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 165 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:53,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 445 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:25:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-18 15:25:53,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 361. [2022-01-18 15:25:53,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.0722222222222224) internal successors, (1106), 360 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1106 transitions. [2022-01-18 15:25:53,476 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1106 transitions. Word has length 21 [2022-01-18 15:25:53,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:53,476 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1106 transitions. [2022-01-18 15:25:53,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:53,476 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1106 transitions. [2022-01-18 15:25:53,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:53,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:53,477 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:53,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (601)] Ended with exit code 0 [2022-01-18 15:25:53,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2022-01-18 15:25:53,677 INFO L402 AbstractCegarLoop]: === Iteration 603 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:53,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1253114675, now seen corresponding path program 11 times [2022-01-18 15:25:53,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:53,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427150494] [2022-01-18 15:25:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:53,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:53,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:53,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427150494] [2022-01-18 15:25:53,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427150494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:53,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162338274] [2022-01-18 15:25:53,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:25:53,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:53,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:53,725 INFO L229 MonitoredProcess]: Starting monitored process 602 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:53,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Waiting until timeout for monitored process [2022-01-18 15:25:54,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:54,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:54,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:54,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-01-18 15:25:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:54,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:54,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:54,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:25:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:54,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162338274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:54,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:54,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:25:54,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452796798] [2022-01-18 15:25:54,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:54,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:25:54,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:54,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:25:54,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:25:54,329 INFO L87 Difference]: Start difference. First operand 361 states and 1106 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:54,510 INFO L93 Difference]: Finished difference Result 600 states and 1753 transitions. [2022-01-18 15:25:54,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:25:54,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:54,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:54,511 INFO L225 Difference]: With dead ends: 600 [2022-01-18 15:25:54,511 INFO L226 Difference]: Without dead ends: 561 [2022-01-18 15:25:54,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:54,512 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:54,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 157 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-01-18 15:25:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 370. [2022-01-18 15:25:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.065040650406504) internal successors, (1131), 369 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1131 transitions. [2022-01-18 15:25:54,516 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1131 transitions. Word has length 21 [2022-01-18 15:25:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:54,516 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1131 transitions. [2022-01-18 15:25:54,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1131 transitions. [2022-01-18 15:25:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:54,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:54,517 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:54,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:54,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,602 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:54,717 INFO L402 AbstractCegarLoop]: === Iteration 604 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:54,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:54,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1242113287, now seen corresponding path program 12 times [2022-01-18 15:25:54,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:54,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785301546] [2022-01-18 15:25:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:54,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:54,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:54,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785301546] [2022-01-18 15:25:54,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785301546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:54,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172852469] [2022-01-18 15:25:54,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:25:54,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:54,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:54,771 INFO L229 MonitoredProcess]: Starting monitored process 603 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:54,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Waiting until timeout for monitored process [2022-01-18 15:25:55,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:25:55,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:55,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:55,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:55,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2022-01-18 15:25:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:55,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:55,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:55,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:25:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:55,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172852469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:55,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:55,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:25:55,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897884483] [2022-01-18 15:25:55,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:55,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:25:55,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:55,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:25:55,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:25:55,514 INFO L87 Difference]: Start difference. First operand 370 states and 1131 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:55,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:55,760 INFO L93 Difference]: Finished difference Result 697 states and 2015 transitions. [2022-01-18 15:25:55,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:25:55,760 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:55,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:55,761 INFO L225 Difference]: With dead ends: 697 [2022-01-18 15:25:55,761 INFO L226 Difference]: Without dead ends: 658 [2022-01-18 15:25:55,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:25:55,761 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:55,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 182 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:55,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-01-18 15:25:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 376. [2022-01-18 15:25:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.08) internal successors, (1155), 375 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1155 transitions. [2022-01-18 15:25:55,766 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1155 transitions. Word has length 21 [2022-01-18 15:25:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:55,766 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1155 transitions. [2022-01-18 15:25:55,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:55,766 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1155 transitions. [2022-01-18 15:25:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:55,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:55,766 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:55,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:55,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,603 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:55,967 INFO L402 AbstractCegarLoop]: === Iteration 605 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash -360035853, now seen corresponding path program 13 times [2022-01-18 15:25:55,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:55,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775521366] [2022-01-18 15:25:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:55,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:56,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:56,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775521366] [2022-01-18 15:25:56,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775521366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:56,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102568088] [2022-01-18 15:25:56,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:25:56,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:56,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:56,016 INFO L229 MonitoredProcess]: Starting monitored process 604 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:56,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (604)] Waiting until timeout for monitored process [2022-01-18 15:25:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:56,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:56,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2022-01-18 15:25:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:56,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:56,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:56,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:25:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:56,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102568088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:56,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:56,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:25:56,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258930350] [2022-01-18 15:25:56,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:56,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:25:56,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:56,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:25:56,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:25:56,681 INFO L87 Difference]: Start difference. First operand 376 states and 1155 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:56,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:56,922 INFO L93 Difference]: Finished difference Result 618 states and 1788 transitions. [2022-01-18 15:25:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:25:56,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:56,923 INFO L225 Difference]: With dead ends: 618 [2022-01-18 15:25:56,923 INFO L226 Difference]: Without dead ends: 567 [2022-01-18 15:25:56,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:25:56,923 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:56,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 154 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-18 15:25:56,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 360. [2022-01-18 15:25:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0473537604456826) internal successors, (1094), 359 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1094 transitions. [2022-01-18 15:25:56,928 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1094 transitions. Word has length 21 [2022-01-18 15:25:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:56,928 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1094 transitions. [2022-01-18 15:25:56,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1094 transitions. [2022-01-18 15:25:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:56,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:56,928 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:56,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (604)] Forceful destruction successful, exit code 0 [2022-01-18 15:25:57,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,604 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:57,129 INFO L402 AbstractCegarLoop]: === Iteration 606 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:57,129 INFO L85 PathProgramCache]: Analyzing trace with hash 946069889, now seen corresponding path program 14 times [2022-01-18 15:25:57,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:57,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929457529] [2022-01-18 15:25:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:57,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:57,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:57,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929457529] [2022-01-18 15:25:57,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929457529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:57,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871966251] [2022-01-18 15:25:57,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:25:57,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:57,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:57,190 INFO L229 MonitoredProcess]: Starting monitored process 605 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:57,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (605)] Waiting until timeout for monitored process [2022-01-18 15:25:57,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:25:57,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:57,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-18 15:25:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:57,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:57,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:57,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-01-18 15:25:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:58,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871966251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:58,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:58,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:25:58,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304488974] [2022-01-18 15:25:58,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:58,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:58,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:58,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:58,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:58,004 INFO L87 Difference]: Start difference. First operand 360 states and 1094 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:58,251 INFO L93 Difference]: Finished difference Result 574 states and 1658 transitions. [2022-01-18 15:25:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:25:58,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:58,252 INFO L225 Difference]: With dead ends: 574 [2022-01-18 15:25:58,252 INFO L226 Difference]: Without dead ends: 535 [2022-01-18 15:25:58,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:25:58,252 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 126 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:58,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 122 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:25:58,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-18 15:25:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 372. [2022-01-18 15:25:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.078167115902965) internal successors, (1142), 371 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1142 transitions. [2022-01-18 15:25:58,257 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1142 transitions. Word has length 21 [2022-01-18 15:25:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:58,257 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1142 transitions. [2022-01-18 15:25:58,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1142 transitions. [2022-01-18 15:25:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:58,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:58,257 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:58,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (605)] Ended with exit code 0 [2022-01-18 15:25:58,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable605 [2022-01-18 15:25:58,458 INFO L402 AbstractCegarLoop]: === Iteration 607 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:58,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1828147323, now seen corresponding path program 15 times [2022-01-18 15:25:58,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:58,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883443431] [2022-01-18 15:25:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:58,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:58,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:58,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883443431] [2022-01-18 15:25:58,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883443431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:58,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458264850] [2022-01-18 15:25:58,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:25:58,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:58,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:58,577 INFO L229 MonitoredProcess]: Starting monitored process 606 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:58,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (606)] Waiting until timeout for monitored process [2022-01-18 15:25:58,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:25:58,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:25:58,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:25:58,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:25:59,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2022-01-18 15:25:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:59,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:25:59,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:25:59,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-01-18 15:25:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:59,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458264850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:25:59,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:25:59,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:25:59,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208065555] [2022-01-18 15:25:59,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:25:59,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:25:59,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:25:59,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:25:59,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:25:59,335 INFO L87 Difference]: Start difference. First operand 372 states and 1142 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:25:59,701 INFO L93 Difference]: Finished difference Result 586 states and 1669 transitions. [2022-01-18 15:25:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:25:59,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:25:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:25:59,702 INFO L225 Difference]: With dead ends: 586 [2022-01-18 15:25:59,702 INFO L226 Difference]: Without dead ends: 535 [2022-01-18 15:25:59,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:25:59,703 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:25:59,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 182 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:25:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-18 15:25:59,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 366. [2022-01-18 15:25:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.063013698630137) internal successors, (1118), 365 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1118 transitions. [2022-01-18 15:25:59,707 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1118 transitions. Word has length 21 [2022-01-18 15:25:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:25:59,707 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1118 transitions. [2022-01-18 15:25:59,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:25:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1118 transitions. [2022-01-18 15:25:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:25:59,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:25:59,708 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:25:59,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (606)] Ended with exit code 0 [2022-01-18 15:25:59,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,606 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:59,908 INFO L402 AbstractCegarLoop]: === Iteration 608 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:25:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:25:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1292917521, now seen corresponding path program 16 times [2022-01-18 15:25:59,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:25:59,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869269433] [2022-01-18 15:25:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:25:59,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:25:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:25:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:25:59,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:25:59,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869269433] [2022-01-18 15:25:59,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869269433] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:25:59,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869735179] [2022-01-18 15:25:59,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:25:59,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:25:59,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:25:59,959 INFO L229 MonitoredProcess]: Starting monitored process 607 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:25:59,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Waiting until timeout for monitored process [2022-01-18 15:26:00,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:26:00,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:00,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:26:00,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:00,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 15:26:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:00,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:00,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:00,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 130 [2022-01-18 15:26:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:00,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869735179] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:00,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:00,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:26:00,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331447308] [2022-01-18 15:26:00,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:00,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:26:00,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:26:00,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:26:00,679 INFO L87 Difference]: Start difference. First operand 366 states and 1118 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:00,931 INFO L93 Difference]: Finished difference Result 508 states and 1463 transitions. [2022-01-18 15:26:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:26:00,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:00,932 INFO L225 Difference]: With dead ends: 508 [2022-01-18 15:26:00,932 INFO L226 Difference]: Without dead ends: 445 [2022-01-18 15:26:00,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:26:00,932 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 94 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:00,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 142 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-18 15:26:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 350. [2022-01-18 15:26:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0286532951289398) internal successors, (1057), 349 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1057 transitions. [2022-01-18 15:26:00,936 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1057 transitions. Word has length 21 [2022-01-18 15:26:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:00,936 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1057 transitions. [2022-01-18 15:26:00,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:00,936 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1057 transitions. [2022-01-18 15:26:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:00,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:00,936 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:00,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:01,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,607 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:01,137 INFO L402 AbstractCegarLoop]: === Iteration 609 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:01,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1986305687, now seen corresponding path program 17 times [2022-01-18 15:26:01,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:01,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312059324] [2022-01-18 15:26:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:01,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:01,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:01,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312059324] [2022-01-18 15:26:01,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312059324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:01,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891529615] [2022-01-18 15:26:01,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:26:01,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:01,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:01,206 INFO L229 MonitoredProcess]: Starting monitored process 608 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:01,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (608)] Waiting until timeout for monitored process [2022-01-18 15:26:01,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:26:01,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:01,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:26:01,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:01,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-01-18 15:26:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:01,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:02,015 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:02,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 95 [2022-01-18 15:26:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:02,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891529615] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:02,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:02,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:26:02,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194823193] [2022-01-18 15:26:02,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:02,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:26:02,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:02,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:26:02,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:26:02,066 INFO L87 Difference]: Start difference. First operand 350 states and 1057 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:02,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:02,448 INFO L93 Difference]: Finished difference Result 568 states and 1640 transitions. [2022-01-18 15:26:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:26:02,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:02,449 INFO L225 Difference]: With dead ends: 568 [2022-01-18 15:26:02,449 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 15:26:02,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:02,449 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:02,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 124 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 15:26:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 368. [2022-01-18 15:26:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.076294277929155) internal successors, (1129), 367 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1129 transitions. [2022-01-18 15:26:02,454 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1129 transitions. Word has length 21 [2022-01-18 15:26:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:02,454 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1129 transitions. [2022-01-18 15:26:02,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1129 transitions. [2022-01-18 15:26:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:02,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:02,454 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:02,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (608)] Ended with exit code 0 [2022-01-18 15:26:02,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable608 [2022-01-18 15:26:02,655 INFO L402 AbstractCegarLoop]: === Iteration 610 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:02,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1426584175, now seen corresponding path program 18 times [2022-01-18 15:26:02,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:02,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863701387] [2022-01-18 15:26:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:02,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:02,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:02,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863701387] [2022-01-18 15:26:02,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863701387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:02,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136979596] [2022-01-18 15:26:02,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:26:02,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:02,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:02,718 INFO L229 MonitoredProcess]: Starting monitored process 609 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:02,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Waiting until timeout for monitored process [2022-01-18 15:26:03,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:26:03,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:03,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:26:03,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:03,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2022-01-18 15:26:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:03,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:03,437 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:03,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 125 [2022-01-18 15:26:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:03,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136979596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:03,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:03,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:26:03,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321987578] [2022-01-18 15:26:03,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:03,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:26:03,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:03,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:26:03,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:26:03,499 INFO L87 Difference]: Start difference. First operand 368 states and 1129 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:03,944 INFO L93 Difference]: Finished difference Result 580 states and 1651 transitions. [2022-01-18 15:26:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:26:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:03,945 INFO L225 Difference]: With dead ends: 580 [2022-01-18 15:26:03,945 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 15:26:03,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:26:03,945 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 168 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:03,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 115 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 15:26:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 362. [2022-01-18 15:26:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0609418282548475) internal successors, (1105), 361 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1105 transitions. [2022-01-18 15:26:03,949 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1105 transitions. Word has length 21 [2022-01-18 15:26:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:03,949 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1105 transitions. [2022-01-18 15:26:03,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1105 transitions. [2022-01-18 15:26:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:03,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:03,950 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:03,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:04,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,609 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:04,150 INFO L402 AbstractCegarLoop]: === Iteration 611 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:04,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:04,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1961813977, now seen corresponding path program 19 times [2022-01-18 15:26:04,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:04,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93412567] [2022-01-18 15:26:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:04,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:04,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:04,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93412567] [2022-01-18 15:26:04,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93412567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:04,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347143182] [2022-01-18 15:26:04,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:26:04,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:04,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:04,208 INFO L229 MonitoredProcess]: Starting monitored process 610 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:04,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (610)] Waiting until timeout for monitored process [2022-01-18 15:26:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:04,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:26:04,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:04,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 15:26:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:04,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:04,885 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:04,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 95 [2022-01-18 15:26:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:04,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347143182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:04,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:04,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:26:04,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264376486] [2022-01-18 15:26:04,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:04,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:26:04,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:04,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:26:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:26:04,958 INFO L87 Difference]: Start difference. First operand 362 states and 1105 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:05,331 INFO L93 Difference]: Finished difference Result 567 states and 1601 transitions. [2022-01-18 15:26:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:26:05,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:05,332 INFO L225 Difference]: With dead ends: 567 [2022-01-18 15:26:05,332 INFO L226 Difference]: Without dead ends: 504 [2022-01-18 15:26:05,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:05,332 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 146 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:05,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 136 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:26:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-18 15:26:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 356. [2022-01-18 15:26:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.045070422535211) internal successors, (1081), 355 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1081 transitions. [2022-01-18 15:26:05,336 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1081 transitions. Word has length 21 [2022-01-18 15:26:05,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:05,336 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1081 transitions. [2022-01-18 15:26:05,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:05,336 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1081 transitions. [2022-01-18 15:26:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:05,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:05,336 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:05,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (610)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:05,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 610 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2022-01-18 15:26:05,537 INFO L402 AbstractCegarLoop]: === Iteration 612 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:05,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1320460787, now seen corresponding path program 20 times [2022-01-18 15:26:05,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:05,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668725053] [2022-01-18 15:26:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:05,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:05,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:05,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668725053] [2022-01-18 15:26:05,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668725053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:05,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142551975] [2022-01-18 15:26:05,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:26:05,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:05,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:05,587 INFO L229 MonitoredProcess]: Starting monitored process 611 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:05,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (611)] Waiting until timeout for monitored process [2022-01-18 15:26:05,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:05,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:26:05,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:06,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 15:26:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:06,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:06,239 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:06,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 125 [2022-01-18 15:26:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:26:06,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142551975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:06,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:06,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:26:06,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683410295] [2022-01-18 15:26:06,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:06,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:26:06,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:06,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:26:06,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:26:06,324 INFO L87 Difference]: Start difference. First operand 356 states and 1081 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:06,671 INFO L93 Difference]: Finished difference Result 496 states and 1421 transitions. [2022-01-18 15:26:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:26:06,671 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:06,672 INFO L225 Difference]: With dead ends: 496 [2022-01-18 15:26:06,672 INFO L226 Difference]: Without dead ends: 421 [2022-01-18 15:26:06,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:26:06,672 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 119 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:06,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 122 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:26:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-01-18 15:26:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 356. [2022-01-18 15:26:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.028169014084507) internal successors, (1075), 355 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1075 transitions. [2022-01-18 15:26:06,676 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1075 transitions. Word has length 21 [2022-01-18 15:26:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:06,676 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1075 transitions. [2022-01-18 15:26:06,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1075 transitions. [2022-01-18 15:26:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:06,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:06,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:06,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (611)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:06,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,611 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:06,877 INFO L402 AbstractCegarLoop]: === Iteration 613 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:06,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1946770262, now seen corresponding path program 591 times [2022-01-18 15:26:06,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:06,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801661996] [2022-01-18 15:26:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:06,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:06,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:06,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801661996] [2022-01-18 15:26:06,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801661996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:06,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134532270] [2022-01-18 15:26:06,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:26:06,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:06,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:06,973 INFO L229 MonitoredProcess]: Starting monitored process 612 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:06,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (612)] Waiting until timeout for monitored process [2022-01-18 15:26:07,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:26:07,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:07,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:26:07,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:07,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:07,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 109 [2022-01-18 15:26:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:08,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:08,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:08,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 135 [2022-01-18 15:26:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:08,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134532270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:08,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:08,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 15:26:08,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944684337] [2022-01-18 15:26:08,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:08,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:26:08,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:08,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:26:08,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:26:08,519 INFO L87 Difference]: Start difference. First operand 356 states and 1075 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:09,381 INFO L93 Difference]: Finished difference Result 1006 states and 3006 transitions. [2022-01-18 15:26:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:26:09,381 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:09,383 INFO L225 Difference]: With dead ends: 1006 [2022-01-18 15:26:09,383 INFO L226 Difference]: Without dead ends: 894 [2022-01-18 15:26:09,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:26:09,383 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 185 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:09,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 555 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1180 Invalid, 0 Unknown, 131 Unchecked, 0.4s Time] [2022-01-18 15:26:09,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-01-18 15:26:09,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 423. [2022-01-18 15:26:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.0331753554502368) internal successors, (1280), 422 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1280 transitions. [2022-01-18 15:26:09,389 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1280 transitions. Word has length 21 [2022-01-18 15:26:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:09,389 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1280 transitions. [2022-01-18 15:26:09,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:09,389 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1280 transitions. [2022-01-18 15:26:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:09,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:09,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:09,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (612)] Ended with exit code 0 [2022-01-18 15:26:09,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2022-01-18 15:26:09,590 INFO L402 AbstractCegarLoop]: === Iteration 614 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:09,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1314032818, now seen corresponding path program 592 times [2022-01-18 15:26:09,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:09,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960721063] [2022-01-18 15:26:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:09,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:09,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:09,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960721063] [2022-01-18 15:26:09,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960721063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:09,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247040062] [2022-01-18 15:26:09,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:26:09,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:09,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:09,724 INFO L229 MonitoredProcess]: Starting monitored process 613 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:09,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (613)] Waiting until timeout for monitored process [2022-01-18 15:26:10,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:26:10,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:26:10,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:10,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:10,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 114 [2022-01-18 15:26:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:11,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:11,473 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:11,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 119 [2022-01-18 15:26:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:11,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247040062] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:11,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:11,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-01-18 15:26:11,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442473336] [2022-01-18 15:26:11,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:11,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:26:11,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:11,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:26:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:26:11,525 INFO L87 Difference]: Start difference. First operand 423 states and 1280 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:12,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:12,773 INFO L93 Difference]: Finished difference Result 961 states and 2830 transitions. [2022-01-18 15:26:12,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:26:12,774 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:12,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:12,775 INFO L225 Difference]: With dead ends: 961 [2022-01-18 15:26:12,775 INFO L226 Difference]: Without dead ends: 946 [2022-01-18 15:26:12,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:26:12,775 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 167 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 560 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:12,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 711 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 997 Invalid, 0 Unknown, 560 Unchecked, 0.3s Time] [2022-01-18 15:26:12,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-01-18 15:26:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 435. [2022-01-18 15:26:12,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.057603686635945) internal successors, (1327), 434 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1327 transitions. [2022-01-18 15:26:12,781 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1327 transitions. Word has length 21 [2022-01-18 15:26:12,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:12,782 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1327 transitions. [2022-01-18 15:26:12,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1327 transitions. [2022-01-18 15:26:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:12,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:12,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:12,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (613)] Ended with exit code 0 [2022-01-18 15:26:12,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2022-01-18 15:26:12,982 INFO L402 AbstractCegarLoop]: === Iteration 615 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:12,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:12,983 INFO L85 PathProgramCache]: Analyzing trace with hash 139499422, now seen corresponding path program 593 times [2022-01-18 15:26:12,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:12,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602885579] [2022-01-18 15:26:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:12,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:13,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602885579] [2022-01-18 15:26:13,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602885579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:13,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792904890] [2022-01-18 15:26:13,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:26:13,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:13,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:13,123 INFO L229 MonitoredProcess]: Starting monitored process 614 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:13,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (614)] Waiting until timeout for monitored process [2022-01-18 15:26:13,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:13,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:13,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:26:13,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:13,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 107 [2022-01-18 15:26:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:14,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:14,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:14,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 105 [2022-01-18 15:26:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:14,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792904890] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:14,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:14,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-01-18 15:26:14,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979920790] [2022-01-18 15:26:14,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:14,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:26:14,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:14,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:26:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:26:14,596 INFO L87 Difference]: Start difference. First operand 435 states and 1327 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:17,794 INFO L93 Difference]: Finished difference Result 1182 states and 3512 transitions. [2022-01-18 15:26:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 15:26:17,794 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:17,796 INFO L225 Difference]: With dead ends: 1182 [2022-01-18 15:26:17,796 INFO L226 Difference]: Without dead ends: 1058 [2022-01-18 15:26:17,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=629, Invalid=3403, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 15:26:17,796 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 340 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:17,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 752 Invalid, 2634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 15:26:17,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-01-18 15:26:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 466. [2022-01-18 15:26:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0731182795698926) internal successors, (1429), 465 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1429 transitions. [2022-01-18 15:26:17,803 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1429 transitions. Word has length 21 [2022-01-18 15:26:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:17,803 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1429 transitions. [2022-01-18 15:26:17,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1429 transitions. [2022-01-18 15:26:17,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:17,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:17,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:17,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (614)] Ended with exit code 0 [2022-01-18 15:26:18,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,614 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:18,004 INFO L402 AbstractCegarLoop]: === Iteration 616 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:18,004 INFO L85 PathProgramCache]: Analyzing trace with hash -326937394, now seen corresponding path program 594 times [2022-01-18 15:26:18,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:18,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677827459] [2022-01-18 15:26:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:18,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:18,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:18,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677827459] [2022-01-18 15:26:18,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677827459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:18,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28124140] [2022-01-18 15:26:18,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:26:18,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:18,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:18,100 INFO L229 MonitoredProcess]: Starting monitored process 615 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:18,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (615)] Waiting until timeout for monitored process [2022-01-18 15:26:18,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:26:18,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:18,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:26:18,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:18,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:18,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 109 [2022-01-18 15:26:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:19,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:19,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:19,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 105 [2022-01-18 15:26:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:19,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28124140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:19,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:19,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 15:26:19,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602382617] [2022-01-18 15:26:19,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:19,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:26:19,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:19,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:26:19,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:26:19,697 INFO L87 Difference]: Start difference. First operand 466 states and 1429 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:20,603 INFO L93 Difference]: Finished difference Result 1217 states and 3655 transitions. [2022-01-18 15:26:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:26:20,603 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:20,605 INFO L225 Difference]: With dead ends: 1217 [2022-01-18 15:26:20,605 INFO L226 Difference]: Without dead ends: 1105 [2022-01-18 15:26:20,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:26:20,605 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 223 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:20,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 701 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1270 Invalid, 0 Unknown, 527 Unchecked, 0.4s Time] [2022-01-18 15:26:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-01-18 15:26:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 453. [2022-01-18 15:26:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.09070796460177) internal successors, (1397), 452 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1397 transitions. [2022-01-18 15:26:20,612 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1397 transitions. Word has length 21 [2022-01-18 15:26:20,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:20,612 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1397 transitions. [2022-01-18 15:26:20,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:20,612 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1397 transitions. [2022-01-18 15:26:20,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:20,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:20,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:20,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (615)] Ended with exit code 0 [2022-01-18 15:26:20,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2022-01-18 15:26:20,813 INFO L402 AbstractCegarLoop]: === Iteration 617 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:20,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:20,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1205270994, now seen corresponding path program 595 times [2022-01-18 15:26:20,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:20,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490389397] [2022-01-18 15:26:20,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:20,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:20,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:20,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490389397] [2022-01-18 15:26:20,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490389397] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:20,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915517611] [2022-01-18 15:26:20,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:26:20,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:20,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:20,919 INFO L229 MonitoredProcess]: Starting monitored process 616 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:20,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (616)] Waiting until timeout for monitored process [2022-01-18 15:26:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:21,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:26:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:21,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:21,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:26:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:21,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:22,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:22,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 84 [2022-01-18 15:26:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:22,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915517611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:22,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:22,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:26:22,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177813296] [2022-01-18 15:26:22,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:22,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:26:22,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:22,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:26:22,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:26:22,118 INFO L87 Difference]: Start difference. First operand 453 states and 1397 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:22,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:22,782 INFO L93 Difference]: Finished difference Result 842 states and 2588 transitions. [2022-01-18 15:26:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:26:22,782 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:22,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:22,783 INFO L225 Difference]: With dead ends: 842 [2022-01-18 15:26:22,783 INFO L226 Difference]: Without dead ends: 795 [2022-01-18 15:26:22,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:26:22,783 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 139 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:22,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 427 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1306 Invalid, 0 Unknown, 203 Unchecked, 0.4s Time] [2022-01-18 15:26:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-18 15:26:22,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 489. [2022-01-18 15:26:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.1045081967213113) internal successors, (1515), 488 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1515 transitions. [2022-01-18 15:26:22,789 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1515 transitions. Word has length 21 [2022-01-18 15:26:22,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:22,789 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1515 transitions. [2022-01-18 15:26:22,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:22,790 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1515 transitions. [2022-01-18 15:26:22,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:22,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:22,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:22,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (616)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:22,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,616 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:22,990 INFO L402 AbstractCegarLoop]: === Iteration 618 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:22,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:22,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1064814312, now seen corresponding path program 596 times [2022-01-18 15:26:22,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:22,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225198791] [2022-01-18 15:26:22,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:22,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:23,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:23,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225198791] [2022-01-18 15:26:23,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225198791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:23,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907699358] [2022-01-18 15:26:23,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:26:23,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:23,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:23,149 INFO L229 MonitoredProcess]: Starting monitored process 617 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:23,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (617)] Waiting until timeout for monitored process [2022-01-18 15:26:23,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:23,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:23,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:26:23,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:24,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:24,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 135 [2022-01-18 15:26:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:24,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:24,875 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:26:24,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 119 [2022-01-18 15:26:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:24,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907699358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:24,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:24,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-01-18 15:26:24,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585730615] [2022-01-18 15:26:24,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:24,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:26:24,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:24,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:26:24,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:26:24,926 INFO L87 Difference]: Start difference. First operand 489 states and 1515 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:25,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:25,971 INFO L93 Difference]: Finished difference Result 896 states and 2717 transitions. [2022-01-18 15:26:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:26:25,971 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:25,973 INFO L225 Difference]: With dead ends: 896 [2022-01-18 15:26:25,973 INFO L226 Difference]: Without dead ends: 881 [2022-01-18 15:26:25,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:26:25,973 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 136 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:25,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 565 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1075 Invalid, 0 Unknown, 246 Unchecked, 0.4s Time] [2022-01-18 15:26:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-18 15:26:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 504. [2022-01-18 15:26:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.1172962226640157) internal successors, (1568), 503 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1568 transitions. [2022-01-18 15:26:25,980 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1568 transitions. Word has length 21 [2022-01-18 15:26:25,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:25,980 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1568 transitions. [2022-01-18 15:26:25,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:25,980 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1568 transitions. [2022-01-18 15:26:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:25,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:25,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:25,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (617)] Ended with exit code 0 [2022-01-18 15:26:26,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable617 [2022-01-18 15:26:26,193 INFO L402 AbstractCegarLoop]: === Iteration 619 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:26,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:26,194 INFO L85 PathProgramCache]: Analyzing trace with hash 388717928, now seen corresponding path program 597 times [2022-01-18 15:26:26,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:26,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011446292] [2022-01-18 15:26:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:26,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:26,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:26,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011446292] [2022-01-18 15:26:26,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011446292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:26,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97503308] [2022-01-18 15:26:26,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:26:26,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:26,303 INFO L229 MonitoredProcess]: Starting monitored process 618 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:26,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (618)] Waiting until timeout for monitored process [2022-01-18 15:26:26,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:26:26,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:26,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:26:26,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:27,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:27,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 140 [2022-01-18 15:26:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:27,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:27,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:27,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 105 [2022-01-18 15:26:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:28,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97503308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:28,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:28,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 15:26:28,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826598131] [2022-01-18 15:26:28,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:28,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:26:28,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:28,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:26:28,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:26:28,059 INFO L87 Difference]: Start difference. First operand 504 states and 1568 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:28,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:28,922 INFO L93 Difference]: Finished difference Result 959 states and 2908 transitions. [2022-01-18 15:26:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:26:28,923 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:28,924 INFO L225 Difference]: With dead ends: 959 [2022-01-18 15:26:28,924 INFO L226 Difference]: Without dead ends: 858 [2022-01-18 15:26:28,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:26:28,924 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 171 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:28,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 522 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1109 Invalid, 0 Unknown, 217 Unchecked, 0.4s Time] [2022-01-18 15:26:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-01-18 15:26:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 522. [2022-01-18 15:26:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.126679462571977) internal successors, (1629), 521 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1629 transitions. [2022-01-18 15:26:28,931 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1629 transitions. Word has length 21 [2022-01-18 15:26:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:28,931 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1629 transitions. [2022-01-18 15:26:28,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1629 transitions. [2022-01-18 15:26:28,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:28,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:28,932 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:28,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (618)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:29,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,618 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:29,132 INFO L402 AbstractCegarLoop]: === Iteration 620 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:29,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:29,132 INFO L85 PathProgramCache]: Analyzing trace with hash -689083144, now seen corresponding path program 598 times [2022-01-18 15:26:29,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:29,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818631587] [2022-01-18 15:26:29,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:29,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:29,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818631587] [2022-01-18 15:26:29,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818631587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966056518] [2022-01-18 15:26:29,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:26:29,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:29,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:29,242 INFO L229 MonitoredProcess]: Starting monitored process 619 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:29,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (619)] Waiting until timeout for monitored process [2022-01-18 15:26:29,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:26:29,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:26:29,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:30,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:30,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 93 [2022-01-18 15:26:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:30,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:30,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:30,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 105 [2022-01-18 15:26:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:30,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966056518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:30,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:30,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 15:26:30,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237612559] [2022-01-18 15:26:30,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:30,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:26:30,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:30,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:26:30,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:26:30,919 INFO L87 Difference]: Start difference. First operand 522 states and 1629 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:31,622 INFO L93 Difference]: Finished difference Result 947 states and 2899 transitions. [2022-01-18 15:26:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:26:31,623 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:31,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:31,624 INFO L225 Difference]: With dead ends: 947 [2022-01-18 15:26:31,624 INFO L226 Difference]: Without dead ends: 896 [2022-01-18 15:26:31,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:26:31,624 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 141 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:31,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 685 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1037 Invalid, 0 Unknown, 396 Unchecked, 0.3s Time] [2022-01-18 15:26:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-01-18 15:26:31,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 508. [2022-01-18 15:26:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.128205128205128) internal successors, (1586), 507 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1586 transitions. [2022-01-18 15:26:31,631 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1586 transitions. Word has length 21 [2022-01-18 15:26:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:31,631 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1586 transitions. [2022-01-18 15:26:31,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:31,631 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1586 transitions. [2022-01-18 15:26:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:31,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:31,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:31,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (619)] Ended with exit code 0 [2022-01-18 15:26:31,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,619 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:31,832 INFO L402 AbstractCegarLoop]: === Iteration 621 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash 243037832, now seen corresponding path program 599 times [2022-01-18 15:26:31,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:31,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220116540] [2022-01-18 15:26:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:31,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:31,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:31,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220116540] [2022-01-18 15:26:31,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220116540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:31,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503915776] [2022-01-18 15:26:31,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:26:31,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:31,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:31,955 INFO L229 MonitoredProcess]: Starting monitored process 620 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:31,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (620)] Waiting until timeout for monitored process [2022-01-18 15:26:32,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:32,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:32,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:26:32,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:32,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:26:32,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 109 [2022-01-18 15:26:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:33,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:33,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:33,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 135 [2022-01-18 15:26:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:33,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503915776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:33,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:33,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 15:26:33,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014795070] [2022-01-18 15:26:33,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:33,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:26:33,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:33,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:26:33,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:26:33,713 INFO L87 Difference]: Start difference. First operand 508 states and 1586 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:34,648 INFO L93 Difference]: Finished difference Result 870 states and 2691 transitions. [2022-01-18 15:26:34,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:26:34,648 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:34,649 INFO L225 Difference]: With dead ends: 870 [2022-01-18 15:26:34,649 INFO L226 Difference]: Without dead ends: 801 [2022-01-18 15:26:34,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=1511, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:26:34,650 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 164 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:34,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 455 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1191 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-01-18 15:26:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-18 15:26:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 519. [2022-01-18 15:26:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 3.1486486486486487) internal successors, (1631), 518 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1631 transitions. [2022-01-18 15:26:34,656 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1631 transitions. Word has length 21 [2022-01-18 15:26:34,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:34,656 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 1631 transitions. [2022-01-18 15:26:34,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1631 transitions. [2022-01-18 15:26:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:34,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:34,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:34,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (620)] Forceful destruction successful, exit code 0 [2022-01-18 15:26:34,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 620 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2022-01-18 15:26:34,857 INFO L402 AbstractCegarLoop]: === Iteration 622 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:34,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2027047474, now seen corresponding path program 600 times [2022-01-18 15:26:34,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:34,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820028451] [2022-01-18 15:26:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:34,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:35,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:35,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820028451] [2022-01-18 15:26:35,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820028451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:35,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426325086] [2022-01-18 15:26:35,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:26:35,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:35,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:35,017 INFO L229 MonitoredProcess]: Starting monitored process 621 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:35,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (621)] Waiting until timeout for monitored process [2022-01-18 15:26:35,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:26:35,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:35,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:26:35,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:35,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 115 [2022-01-18 15:26:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:35,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:36,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:36,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 84 [2022-01-18 15:26:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:36,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426325086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:36,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:36,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-01-18 15:26:36,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081961482] [2022-01-18 15:26:36,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:36,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:26:36,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:36,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:26:36,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:26:36,151 INFO L87 Difference]: Start difference. First operand 519 states and 1631 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:37,955 INFO L93 Difference]: Finished difference Result 1110 states and 3338 transitions. [2022-01-18 15:26:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:26:37,955 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:37,957 INFO L225 Difference]: With dead ends: 1110 [2022-01-18 15:26:37,957 INFO L226 Difference]: Without dead ends: 1019 [2022-01-18 15:26:37,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=307, Invalid=1855, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 15:26:37,957 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 223 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:37,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 707 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2608 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:26:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-01-18 15:26:37,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 439. [2022-01-18 15:26:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.0913242009132422) internal successors, (1354), 438 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1354 transitions. [2022-01-18 15:26:37,963 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1354 transitions. Word has length 21 [2022-01-18 15:26:37,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:37,964 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1354 transitions. [2022-01-18 15:26:37,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:37,964 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1354 transitions. [2022-01-18 15:26:37,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:37,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:37,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:37,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (621)] Ended with exit code 0 [2022-01-18 15:26:38,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,621 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:38,164 INFO L402 AbstractCegarLoop]: === Iteration 623 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:38,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1464066318, now seen corresponding path program 601 times [2022-01-18 15:26:38,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:38,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715895427] [2022-01-18 15:26:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:38,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:38,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:38,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715895427] [2022-01-18 15:26:38,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715895427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:38,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139207285] [2022-01-18 15:26:38,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:26:38,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:38,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:38,266 INFO L229 MonitoredProcess]: Starting monitored process 622 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:38,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (622)] Waiting until timeout for monitored process [2022-01-18 15:26:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:38,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:26:38,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:26:38,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2022-01-18 15:26:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:39,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:26:39,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:26:39,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-01-18 15:26:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:39,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139207285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:26:39,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:26:39,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-01-18 15:26:39,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992976857] [2022-01-18 15:26:39,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:26:39,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:26:39,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:26:39,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:26:39,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:26:39,709 INFO L87 Difference]: Start difference. First operand 439 states and 1354 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:26:40,760 INFO L93 Difference]: Finished difference Result 914 states and 2683 transitions. [2022-01-18 15:26:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:26:40,760 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:26:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:26:40,762 INFO L225 Difference]: With dead ends: 914 [2022-01-18 15:26:40,762 INFO L226 Difference]: Without dead ends: 845 [2022-01-18 15:26:40,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:26:40,762 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 207 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:26:40,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 511 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1804 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:26:40,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-01-18 15:26:40,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 455. [2022-01-18 15:26:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.1211453744493394) internal successors, (1417), 454 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1417 transitions. [2022-01-18 15:26:40,768 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1417 transitions. Word has length 21 [2022-01-18 15:26:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:26:40,768 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1417 transitions. [2022-01-18 15:26:40,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:26:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1417 transitions. [2022-01-18 15:26:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:26:40,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:26:40,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:26:40,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (622)] Ended with exit code 0 [2022-01-18 15:26:40,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2022-01-18 15:26:40,969 INFO L402 AbstractCegarLoop]: === Iteration 624 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:26:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:26:40,969 INFO L85 PathProgramCache]: Analyzing trace with hash 501833156, now seen corresponding path program 602 times [2022-01-18 15:26:40,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:26:40,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839275390] [2022-01-18 15:26:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:26:40,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:26:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:26:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:26:41,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:26:41,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839275390] [2022-01-18 15:26:41,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839275390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:26:41,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808971498] [2022-01-18 15:26:41,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:26:41,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:26:41,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:26:41,079 INFO L229 MonitoredProcess]: Starting monitored process 623 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:26:41,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (623)] Waiting until timeout for monitored process [2022-01-18 15:26:41,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:26:41,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:26:41,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:26:41,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2022-01-18 15:26:41,506 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 15:26:41,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (623)] Ended with exit code 0 [2022-01-18 15:26:41,530 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (623)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:26:41,530 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:26:41,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2022-01-18 15:26:41,707 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. [2022-01-18 15:26:41,708 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 15:26:41,708 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 15:26:41,708 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 15:26:41,711 INFO L732 BasicCegarLoop]: Path program histogram: [602, 20, 1, 1] [2022-01-18 15:26:41,714 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 15:26:41,714 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 15:26:41,720 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 03:26:41 BasicIcfg [2022-01-18 15:26:41,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 15:26:41,721 INFO L158 Benchmark]: Toolchain (without parser) took 800447.12ms. Allocated memory was 385.9MB in the beginning and 939.5MB in the end (delta: 553.6MB). Free memory was 345.5MB in the beginning and 694.1MB in the end (delta: -348.6MB). Peak memory consumption was 206.2MB. Max. memory is 16.0GB. [2022-01-18 15:26:41,721 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 385.9MB. Free memory is still 346.8MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:26:41,721 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.53ms. Allocated memory is still 385.9MB. Free memory was 345.5MB in the beginning and 343.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 15:26:41,721 INFO L158 Benchmark]: Boogie Preprocessor took 11.50ms. Allocated memory is still 385.9MB. Free memory was 343.9MB in the beginning and 342.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:26:41,721 INFO L158 Benchmark]: RCFGBuilder took 225.94ms. Allocated memory is still 385.9MB. Free memory was 342.9MB in the beginning and 328.5MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-18 15:26:41,721 INFO L158 Benchmark]: TraceAbstraction took 800187.69ms. Allocated memory was 385.9MB in the beginning and 939.5MB in the end (delta: 553.6MB). Free memory was 328.1MB in the beginning and 694.1MB in the end (delta: -366.0MB). Peak memory consumption was 189.4MB. Max. memory is 16.0GB. [2022-01-18 15:26:41,722 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 385.9MB. Free memory is still 346.8MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 17.53ms. Allocated memory is still 385.9MB. Free memory was 345.5MB in the beginning and 343.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 11.50ms. Allocated memory is still 385.9MB. Free memory was 343.9MB in the beginning and 342.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 225.94ms. Allocated memory is still 385.9MB. Free memory was 342.9MB in the beginning and 328.5MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 800187.69ms. Allocated memory was 385.9MB in the beginning and 939.5MB in the end (delta: 553.6MB). Free memory was 328.1MB in the beginning and 694.1MB in the end (delta: -366.0MB). Peak memory consumption was 189.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 800.1s, OverallIterations: 624, TraceHistogramMax: 2, PathProgramHistogramMax: 602, EmptinessCheckTime: 0.3s, AutomataDifference: 239.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 75662 SdHoareTripleChecker+Valid, 119.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 75662 mSDsluCounter, 120714 SdHoareTripleChecker+Invalid, 98.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2612 IncrementalHoareTripleChecker+Unchecked, 214407 mSDsCounter, 6276 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 370924 IncrementalHoareTripleChecker+Invalid, 379812 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6276 mSolverCounterUnsat, 12362 mSDtfsCounter, 370924 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 33503 GetRequests, 18408 SyntacticMatches, 315 SemanticMatches, 14780 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69086 ImplicationChecksByTransitivity, 218.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=522occurred in iteration=619, InterpolantAutomatonStates: 6400, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.8s AutomataMinimizationTime, 623 MinimizatonAttempts, 112721 StatesRemovedByMinimization, 620 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.3s SsaConstructionTime, 6.0s SatisfiabilityAnalysisTime, 316.0s InterpolantComputationTime, 24913 NumberOfCodeBlocks, 24913 NumberOfCodeBlocksAsserted, 1816 NumberOfCheckSat, 35487 ConstructedInterpolants, 61 QuantifiedInterpolants, 257975 SizeOfPredicates, 8925 NumberOfNonLiveVariables, 56080 ConjunctsInSsa, 12644 ConjunctsInUnsatCore, 1865 InterpolantComputations, 2 PerfectInterpolantSequences, 2576/7507 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown